It's the first hearing since the release of a 300-page report by Democrats on the House Intelligence Committee that found “serious misconduct” by the Republican president.
House Democrats have announced they'll hold the first public hearings next week in their impeachment inquiry of President Donald Trump.
The House Intelligence Committee has subpoenaed former White House national security adviser Michael Flynn and former Trump campaign aide Rick Gates as part of its investigation into Russian efforts to interfere with the 2016 election.
House Democrats angling to spotlight damning allegations from special counsel Robert Mueller's report are focusing Wednesday on contacts between Donald Trump's presidential campaign and Russia.
The House has rejected an effort to force lawmakers to vote by the end of March on new war powers to fight Islamic State militants.