Twitter CEO Jack Dorsey reportedly called Rep. Ilhan Omar (D-Minn.) to defend the platform's decision to keep up a tweet from President Trump that the congresswoman said resulted in a surge in death threats.

The Washington Post, citing a Twitter source, reported that Dorsey told Omar in a Tuesday phone call that the president's tweet did not violate the company's rules. Dorsey reportedly made the comment after Omar pressed him on why the company did not remove the tweet from the site, a person familiar with the conversation told the newspaper.

Dorsey also argued that the tweet and video Trump shared had been promoted outside the boundaries of Twitter, a source told the Post. But he did acknowledge that the tech giant needed to become more effective at removing hate and harassment from the site, two people familiar with the call told the Post.

Omar has been under fire from Trump and other conservatives over her past comments criticizing the equating of all Muslims with the 9/11 hijackers in the wake of the terrorist attacks.

"[Muslim advocacy group] CAIR was founded after 9/11 because they recognized that some people did something and that all of us were starting to lose access to our civil liberties," she said.

Earlier this month, Trump shared an edited video on Twitter that featured images of the 9/11 terrorist attack coupled with Omar's commentary spliced in. The tweet did not include the context regarding Omar's remarks. Omar said that the tweet led to "an increase in direct threats on my life - many directly referencing or replying to the President's video."

"Violent rhetoric and all forms of hate speech have no place in our society, much less from our country's Commander in Chief," Omar said in a statement at the time. "We are all Americans. This is endangering lives. It has to stop."

Omar's office declined to comment to The Washington Post. Her office confirmed that the call took place to The Hill, but declined to comment on it further.

A Twitter spokesperson said in a statement to The Hill that Dorsey "emphasized that death threats, incitement to violence, and hateful conduct are not allowed on Twitter" during their call.

"We've significantly invested in technology to proactively surface this type of content and will continue to focus on reducing the burden on the individual being targeted," Twitter added. "Our team has also consistently been in touch with Rep. Omar's office."

The White House did not respond to a request for comment from the Post and did not immediately return a request for comment from The Hill.

Dorsey's discussion with Omar came the same day he met with Trump at the Oval Office. Trump spent a substantial amount of their meeting complaining about his followers, the Post reported.

Trump, who has repeatedly accused tech companies of censoring conservatives, reportedly said that he believed Twitter was deliberately removing his followers. Dorsey emphasized that follower counts can change as the platform works to eliminate bots and fake accounts, according to the report.

Updated at 6:40 p.m.