On Wednesday, in a public session before the House of Representatives Oversight Committee, Cohen intends to give lawmakers "granular details" about a hush-money payment to adult film actress Stephanie Clifford, known as Stormy Daniels, and information about a "money trail" after Trump became president, said the source familiar with the matter, who asked not to be identified.
That's important because it meant Trump's camp was negotiating with Russians at the same time that Moscow was interfering in the 2016 presidential election with the ultimate aim of helping him.
Separately, Cohen also pleaded guilty in special counsel Robert Mueller's investigation for lying to Congress about his involvement in a Trump Tower project in Moscow that he brokered during Trump's campaign.
President Trump's former attorney Michael Cohen is kicking off his week of congressional testimony by appearing before the Senate Intelligence Committee on Tuesday for what is expected to be a lengthy closed-door grilling by lawmakers. But a judge granted a request from Cohen's lawyers to push the date to May 6 so Cohen could recover from shoulder surgery and prepare for his congressional testimony.
If that's not enough to get you to set the timer on your popcorn popper for 7 am Pacific tomorrow, consider this: Alexandria Ocasio-Cortez, a member of the House Oversight Committee, could be one of the Democrats grilling Cohen about Trump tomorrow morning.
The White House is seeking to discredit President Donald Trump's former personal lawyer as he makes a series of appearances on Capitol Hill.
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It's Cohen's first appearance before Congress since being charged for lying to the Senate and House Intelligence Committees in 2017.
"Convicted felon Michael Cohen is going to prison for lying, including lies he told under oath to Congress", McDaniel said.
The 52-year-old was convicted last year by NY federal prosecutors of campaign finance violations and tax evasion and by special counsel Robert Mueller of lying to Congress about Trump Organization plans in Moscow.
Trump fired back, saying that Cohen has "only been threatened by the truth".
The Oversight committee plans to examine Trump's compliance with tax and campaign-finance laws, his potential conflicts of interest, and any payments made to influence the 2016 election, according to a memo from committee chair Elijah Cummings.
"We think he has a lot to offer", Adam Schiff, chairman of the House Intelligence Committee, told ABC's "This Week" on Sunday.