Total donations: $6,463,400 Party: Republican Net worth: $3.5 billion Singer is the founder of investment firm Elliott Management, according to his biography on the firm's website, but he is better known for his advocacy for conservative causes, Forbes reports. Once a major critic of President Trump, Singer has since met with him at the White House. Singer does break with the President on one important issue, however — Singer is also an advocate for LGBTQ+ rights.Total donations: $6,544,024 Party: Republican Net worth: Unknown Robert Mercer, 73, is the former co-CEO of Renaissance Technologies, a hedge fund valued at $50 million in 2017, according to The New York Times. Mercer left the hedge fund in 2017 after clients, including the retirement fund for Baltimore's police and firefighters, withdrew their investments from Renaissance over concern about Mercer's political donations and involvement with Breitbart, The Times reported. The $6.5 million that Robert and his wife Diana donated to Republicans in 2018 was the smallest figure they've given in any election cycle since 2012, CNBC reported. The couple, once among President Trump's biggest supporters, have become fatigued by the resulting media attention, sources told CNBC.Total donations: $6,574,352 Party: Republican Net worth: Unknown Ronald Cameron is the CEO of the poultry company founded by his grandfather, according to the North Caroline Poultry Foundation. Mountaire Corp is the seventh-largest producer of chicken in the country, the foundation reports. An alum of the University of Arkansas, Ronald and his wife Nina have four children and nine grandchildren, according to the foundation's website. The Camerons were responsible for 80% of total donations to Mike Huckabee's 2016 presidential run, ABC News reported.Total donations: $6,750,150 Party: Democrat Net worth: Unknown Cindy Simon-Skjodt serves as the chair of the couple's non-profit, the Samerian Foundation, according to its website. The foundation provides grants for education, economic development, and youth sports initiatives, according to its website. Paul Skjodt is a former professional hockey player and real estate developer, according to his biography on the foundation's website. The Skjodts donated $20 million to create a genocide prevention center at the United States Holocaust Memorial Museum in Washington, D.C. in 2015, according to The Indianapolis Business Journal.Total donations: $7,611,083 ($7,295,833 to conservatives, $250 to liberals) Party: Republican Net worth: Unknown Jeffrey Yass is a cofounder of trading firm Susquehanna International Group, according to the company's website. The couple also donated $250 to liberals in addition to their support of conservatives, according to the Center for Responsive Politics. Total Donations: $7,713,540 Party: Democrat Net worth: Unknown Joshua Bekenstein is the co-chairman of Bain Capital, the private equity firm cofounded by Mitt Romney, according to Fortune. Anita, Joshua's wife, is a philanthropist who manages the couple's private fund, which supports health, education, arts, and environmental non-profits, in addition to serving on the board of patient advocacy non-profit Upstream USA, according to her biography on the organization's website. The couple lives in Boston and has five children, according to Anita's biography on the organization's website.Total donations: $7,720,230 Party Affiliation: Democrat Net worth: $11.8 billion After leaving Facebook in 2008, Dustin Moskovitz founded workflow management platform Asana, according to Forbes. Alongside his wife Cari Tuna, Moskovitz has donated millions to health and LGBTQ+ organizations through their foundation Good Ventures, Forbes reports. Moskovitz maintains a 3% stake in Facebook, according to Forbes. Total donations: $8,000,018 ($7,980,318 to conservatives, $500 to liberals) Party Affiliation: Republican Net worth: $6.5 billion Bernie Marcus cofounded Home Depot in 1978 with Arthur Blank after they were fired from their jobs at another hardware store, according to Forbes. Marcus was the company's first CEO and retired in 2002. Marcus was a major contributor to President Trump's 2016 presidential bid and will support the President again in 2020, Business Insider previously reported. Read more: The billionaire cofounder of Home Depot plans on donating up to 90% of his $5.9 billion fortune, and Trump's 2020 campaign will be one of the beneficiariesTotal donations: $8,531,440 Party Affiliation: Republican Net worth: $8.2 billion Charles Schwab, 81, founded his brokerage firm in 1971 and served as its CEO until 2008, according to Forbes. Schwab's fortune comes from his 11% stake in the firm. Helen is a philanthropist and serves as the president of the board of the Charles and Helen Schwab Foundation, according to the organization's website. The couple resides in Woodside, California and has 5 children, according to Forbes.Total donations: $9,315,826 ($433,500 to conservatives, $8,317,326 to liberals) Party Affiliation: Democrat Net worth: $1.9 billion Reid Hoffman was an early employee of PayPal and one of the first investors in Facebook, according to Forbes. Hoffman founded Linkedin in 2003. Hoffman sold LinkedIn for $26.2 billion to Microsoft in 2016 and now sits on Microsoft's board, according to Forbes. Hoffman gave $8,317,326 to Democrats and $433,500 to Republicans in 2018, according to the Center for Responsive Politics. Total donations: $9,610,125 ($10,400 to conservatives, $9,579,725 to liberals) Party Affiliation: Democrat Net worth: $1.5 billion George Marcus is the founder of real-estate brokerage Marcus & Millichap Company, according to the company's website. Marcus is also the chairman of Essex Property Trust, a multi-family real-estate investment trust, and he serves on the board of California-based commercial bank Greater Bay Bancorp. The Marcuses gave $10,400 to Republicans in 2018, according to the Center for Responsive Politics. The rest went to Democrats.Total donations: $9,744,070 Party Affiliation: Democrat Net worth: Unknown Deborah Simon is the daughter of Indiana shopping mall developer Melvin Simon. Simon inherited a portion of her father's fortune after a bitter legal battle over his estate with her stepmother Bren Simon, according to Forbes. Simon's family had a net worth of $6.8 billion in 2014, according to Forbes.Total donations: $10,061,000 ($10,058,300 to conservatives, $2,700 to liberals) Party Affiliation: Republican Net worth: $1 billion Timothy Mellon, the grandson of twentieth-century business magnate Andrew Mellon, funded the founding of New Hampshire-based railroad company, Guilford Transportation Industries, according to Forbes. While most of Mellon's donations were to conservatives, Mellon also gave $2,700 to Rep. Alexandria Ocasio-Cortez, according to The Guardian.Total donations: $10,186,170 Party Affiliation: Non-partisan, lean conservative Net worth: $107.4 billion, $33.9 billion Amazon CEO Jeff Bezos and novelist MacKenzie Bezos made 60% of their donations to Republicans and 40% of their donations to Democrats, according to The Center for Responsive Politics. The pair finalized their divorce in July 2019, Business Insider previously reported. Read more: 25 years after Amazon's launch, Jeff Bezos is the richest person alive. Here's how he makes and spends his billions.Total donations: $12,431,198 ($5,400 to conservatives, $12,415,726 to liberals) Party Affiliation: Democrat Net worth: Unknown Karla Jurvetson is the ex-wife of venture capitalist Steve Jurvetson, according to The Guardian. Her largest donation, $5.4 million, was to a Super PAC aimed at elected pro-choice female candidates run by Emily's List, The Guardian reported.Total donations: $12,665,400 Party Affiliation: Democrat Net worth: $500 million in 2005 Fred Eychaner is the chairman of Newsweb Corp. Eychaner became wealthy after selling a television station to Rupert Murdoch's NewsCorp for $425 million in 2002, according to Crain's Chicago Business. Eychaner is also a major supporter of Hillary Clinton. He financially backed her 2008 and 2016 presidential bids, according to Crain's Chicago Business.Total donations: $12,882,200 Party Affiliation: Republican Net worth: $16.7 billion Stephen Schwarzman, 72, cofounded the private equity firm in 1985, according to Forbes. Total donations: $19,225,125 Party Affiliation: Republican Net worth: $12.7 billion Ken Griffin is the founder and CEO of Chicago-based hedge fund Citadel, according to The Guardian. Citadel manages $32 billion in assets, according to Forbes. Griffin also owns the most expensive apartment ever sold in New York City, Business Insider previously reported. Read more: Hedge-fund manager Ken Griffin's $238 million NYC apartment shattered the US real estate record — here's a look at his record-setting properties and penthousesTotal donations: $20,135,586 Party Affiliation: Democrat Net worth: $8.3 billion Soros built his fortune leading Quantum Fund, once the world's largest hedge fund. Since retiring from money managing in 2011, Soros has turned his attention to philanthropy. He started donating to campaigns in 2003 because of his dissatisfaction with the war in Iraq, Business Insider previously reported. Soros has also found himself at the center of numerous conspiracy theories about his involvement in governments from the United States to Hungary to Russia, many of which are anti-Semitic and have never been supported by evidence. Read more: What George Soros' life is really like: How the former hedge-fund manager built his $8.3 billion fortune, purchased a sprawling network of New York homes, and became the topic of international conspiracy theoriesTotal donations: $22,165,010 Party Affiliation: Democrat Net worth: $21.6 billion James Simons, the founder of quantitative hedge fund Renaissance Technologies, was named the highest-paid hedge fund manager of 2019 by Forbes. James and his wife, economist and philanthropist Marilyn Simons, are also major donors to Stony Brook University, where they met, according to Bloomberg.Total donations: $27,545,500 Party Affiliation: Democrat Net worth: Unknown Donald Sussman is the founder of Paloma Partners. The Fort Lauderdale-based hedge fund was the top donor to Hillary Clinton's 2016 presidential campaign, giving $21.6 million, according to The Guardian. Total donations: $39,854,296 Party Affiliation: Republican Net worth: Between $700 million and $2 billion in 2014 Richard Uihlein is the founder of the Wisconsin-based shipping materials company Uline, according to Forbes. I'm a conservative Republican, and I'm trying to help people who believe as I do in limited government and free markets, Richard Uihlein said in 2013, according to Forbes. I'm not one to hide from that.Total donations: $73,819,973 Party Affiliation: Democrat Net worth: $1.6 billion Tom Steyer, 62, ran hedge fund Farallon Capital before becoming a full-time activist in 2012, according to Forbes. Read more: Billionaire activist Tom Steyer just jumped into the 2020 Democratic field after previously ruling out a presidential runTotal donations: $95,098,168 ($5,400 to conservative, $94,837,766 to liberals) Party Affiliation: Democrat Net worth: $52.4 billion Michael Bloomberg, 77, is the founder and CEO of financial media company Bloomberg LP. Bloomberg will spend $500 million on the 2020 election in hopes of defeating Trump, Politico reported in February. On November 7, The New York Times reported that he was actively preparing to enter the Democratic primary.Total donations: $123,244,400 Party Affiliation: Republican Net worth: $33.6 billion Sheldon Adelson, 86, is the CEO of the Las Vegas Sands casino company, according to Forbes. Adelson is also an avid Trump supporter. Adelson was the largest donor to both Trump's 2016 presidential campaign and his inauguration fund, according to The Guardian.