U.S. Secret Service Director Kimberly Cheatle acknowledged before Congress her agency failed to protect Republican presidential candidate Donald Trump during a July 13 rally in Pennsylvania. Cheatle took full responsibility for the security lapse.<br /><br />Cheatle described the attempt on Trump’s life as the most significant operational failure at the Secret Service in decades.<br /><br />Cheatle has so far resisted calls for her resignation from Republican leaders, including Johnson and Mitch McConnell.