Rep. Ilhan Omar, D-Minn., departs a meeting of the House Democratic Caucus as Congress returns for the fall session with pressure mounting for a response to gun violence, at the Capitol in Washington, Tuesday, Sept. 10, 2019. Congressional Democrats are pressing President Donald Trump to intervene with Senate Republicans and demand passage of a bipartisan bill to expand background checks for gun purchases. (AP Photo/J. Scott Applewhite)