Live updates: Secret Service director faces calls to resign at hearing

Secret Service Director Kimberly Cheatle is testifying before the House Oversight and Accountability Committee on Monday to face questions about the security lapses that allowed a gunman to open fire on former President Trump at a rally about a week ago.

Cheatle is facing calls to resign or be fired, largely from Republicans, but has so far said she's staying put. Rep. Ro Khanna (D-Calif.) was the first Democrat on the committee to call for her resignation on Monday.

Oversight Committee Chair James Comer (R-Ky.) and ranking member Jamie Raskin (D-Md.) issued a joint letter last week urging Cheatle to appear "without delay."

“Americans have many serious questions about the historic security failures that occurred at the campaign rally in Butler, Pennsylvania," they wrote.

While many questions remain about the shooting and Secret Service actions that day, a number of revelations over the past week have increased the heat on Cheatle ahead of today's hearing.