The Democratic-led U.S. House of Representatives is expected to formally send impeachment charges against President Donald Trump to the Senate this week, where Majority Leader Mitch McConnell has vowed to help acquit his fellow Republican.

Rather than immediately sending the two articles of impeachment passed by the House on Dec. 18 to the Republican-led Senate, Democratic House Speaker Nancy Pelosi held on to them, preventing McConnell from dispensing with the matter with a quick trial that cleared the president. The House charged Trump with abuse of power and obstruction of Congress in its investigation of his dealings with Ukraine.

House Democrats will discuss on Tuesday morning how to move forward, Pelosi said on Sunday, with the chamber possibly voting to send the charges to the Senate later that day.