Acosta told Wolf Blitzer on CNN that Trump only wanted to speak to politically conservative publications that wouldn't probe about his alleged contacts with Russian officials, which was the major story at the time.
"In the last three news conferences, Wolf, all of the questions to the American news media have been handled by conservative press. I think, Wolf, there's no other way to describe it, but the fix is in," Acosta said. "This president does not want to answer questions, critical questions about his associates, his aide's contacts with the Russians during the course of that campaign, just as his national security adviser is being run out of the White House on a rail."
After being confronted about Acosta being heckled, Sarah Huckabee Sanders spread a false story about US media foiling plans to track Osama bin Laden.
Trump frequently taunts the media during his campaign rallies, and his crowds often chant "CNN sucks." The refrain drew widespread attention in July, when Acosta shared video footage of people heckling him while he reported from one such rally.
When Huckabee Sanders, Trump's press secretary, was asked about the event at a White House press conference she deflected the question and stressed that journalists should "act responsibly and report accurately and fairly."
She then pivoted to a long-debunked urban myth, alleging that US media reports foiled a plan to track down former Al Qaeda chief Osama bin Laden in the 1990s. According to this false story, journalists leaked classified information that led bin Laden to stop using a satellite phone, which caused the US government to lose vital intelligence about him.
"Listen, if they want to send me to hell, I'll still be shouting at the devil," Acosta said. "We have a job to do. I've said this times before and I'll say it again. They can kick us out of the briefing room, they can kick us out of the White House. We're still going to do our jobs."
Acosta and Trump's campaign manager Brad Parscale argued over the First Amendment.
The tax cut speech wasn't the first time Acosta shouted questions during an event. At the White House's Easter Easter Egg Roll event in April, Acosta asked the president about ending DACA.
"The Democrats have really let them down," Trump replied.
"I think the White House should pull credentials because he yelled questions, as he continues to do at inappropriate times, while the President was coloring books with children," Parscale said on Twitter. "Disrespectful and would have never been allowed previously."
Acosta defended himself.
"Just doing my job.. which is protected by the First Amendment of The Constitution," he said on Twitter. "You might want to give it a read."
Following the Easter incident, Trump lashed out at CNN's president.
After the tussle between Acosta and Parscale, Trump tweeted criticism of Jeff Zucker, CNN's president and the former NBC executive who greenlit "The Apprentice" years ago. Trump misspelled Zucker's name in his tweet.
"Check out the fact that you can't get a job at ratings challenged @CNN unless you state that you are totally anti-Trump? Little Jeff Zuker, whose job is in jeopardy, is not having much fun lately," Trump tweeted. "They should clean up and strengthen CNN and get back to honest reporting!"
Zucker is still employed as CNN's president.
Acosta sparred with Stephen Miller over slashing the number of immigrants who don't speak English.
In August 2017, Trump's far-right anti-immigrant policy advisor Stephen Miller took the White House podium. He discussed Trump's support of a bill that would have halved the number of immigrants the United States legally permits into the country, taking English language skills into consideration. (The bill never passed, but Trump has used his executive powers to severely limit the number of immigrants legally permitted to come to the US.)
Acosta quoted "The New Colossus," the poem written on the Statue of Liberty to Miller, and the two argued over what it meant to be an American. Acosta asked whether Miller wanted only people from Great Britain and Australia to be allowed into the US.
"I am shocked at your statement that you think only people from Great Britain and Australia would know English," Miller said. "It reveals your cosmopolitan bias to a shocking degree."
Miller's performance was denounced by Eric Bolling on Fox News, Trump's biggest media ally.
"Don't put that guy in front of the cameras again," Bolling said.
Acosta railed against Trump spreading conspiracy theories.
He took aim at birtherism, the conspiracy theory that former President Barack Obama wasn't born in the United States. Trump was the chief purveyor of the theory.
"The president of the United States is also a purveyor of fake news," Acosta said. "He is the founding father of birtherism."
Acosta listed off a series of debunked stories shared by Trump and other White House staff members, such as Sean Spicer's argument that Trump's inauguration crowds were bigger than Barack Obama's in 2009.
"[Trump] came out right after his inauguration and said his inauguration crowds were bigger than President Obama's, when they weren't," Acosta said. "We had photographic evidence from the National Parks Service to prove that point."
Acosta criticized Sean Spicer for holding press conferences that news outlets weren't permitted to record.
"The White House press secretary is getting to a point, Brooke, where he's just kind of useless," Acosta said on CNN. "If he can't come out and answer the questions, and they're just not going to do this on camera or audio, why are we even having these briefings or these gaggles in the first place?"