Multiple outlets report Michael Cohen could provide evidence related to allegations of criminal conduct against President Trump when he publicly testifies in front of a House committee Wednesday.
Cohen, President Trump's former lawyer, was sentenced to three years in prison in December for arranging payments to women who say they had affairs with Trump, lying to Congress and not reporting millions of dollars in income.
An unnamed source told NBC News that Cohen will also clear up whether President Trump had a role in Cohen making a payment to Stormy Daniels or reimbursing Cohen for that payment.
Last week on Twitter, after his testimony was scheduled, Cohen tweeted: "Looking forward to the American people hearing my story in my voice!"
But Cohen has already been convicted of lying to Congress once, so his testimony will likely be watched carefully. President Trump has repeatedly called Cohen a liar.
In a statement Tuesday, White House press secretary Sarah Sanders said Cohen "is going to prison for lying to Congress and making other false statements. Sadly, he will go before Congress this week and we can expect more of the same."