Pelosi named House Intelligence Committee chairman Rep. Adam Schiff (D-CA), House Judiciary Committee Chairman Rep. Jerry Nadler, along with Reps. Hakeem Jeffries (D-NY), Val Demings (D-FL), Zoe Lofgren (D-CA), Jason Crow (D-CO), and Sylvia Garcia (D-TX). Schiff will take on the role of lead impeachment manager.

"Today is an important day," said Pelosi at a Capitol Hill press conference. "The emphasis is making the strongest possible case to protect and defend our constitution, to seek the truth for the American people."

A House vote to send the articles to the Senate is scheduled for early Wednesday afternoon. The measure is expected to pass. If it does, the Senate trial is expected to begin early next week, Senate Republican leader Mitch McConnell said.

Ahead of the historic trial, the White House is finalizing the legal team that will defend Trump.