7 officials confirmed Trump tried to get Ukraine to investigate the Bidens as part of a quid pro quo - here's the list

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President Donald Trump and Ukrainian President Volodymyr Zelensky speak during a meeting in New York on September 25, 2019, on the sidelines of the United Nations General Assembly.

• Since the impeachment inquiry into Donald Trump began, the president and his allies have vigorously denied the notion of a quid pro quo agreement.
• That supposed agreement involves the releasing of military aid to Ukraine in exchange for an investigation into the Biden family.
• As public impeachment hearings enter their second week, a growing number of key figures have offered account supporting the notion of a quid pro quo.
• On Wednesday, Gordon Sondland, Trump's ambassador to the European Union, plainly said Trump wanted a quid pro quo arrangement.
• At least five other figures with knowledge of the supposed agreement have reinforced the notion of a quid pro quo in their impeachment inquiry testimonies.
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A central point of contention during president Trump's impeachment hearing has revolved around whether or not a quid pro quo agreement occurred. That supposed agreement involves the releasing of military aid to Ukraine in exchange for an investigation into the Biden family.

President Trump and his allies have vigorously denied any notion of a quid pro quo since the impeachment inquiries began. As more officials with knowledge of the supposed agreement continue to testify under oath thought though, evidence of a known agreement is becoming harder and harder to deny.

At least five other key impeachments witnesses - along with Republican Sen. Ron Johnson and White House Chief of Staff Mick Mulvaney - have supported the notion of a quid pro quo in both closed-door and public hearings. Here's who they are.