 This, according to a person familiar with how she spent her day. And it appears to have worked. The endorsements have been rolling in, including from many of the big-name Democrats who had previously been mentioned as possible candidates. Tamara Keith, NPR News. The head of the Secret Service, Kimberly Cheadle, is testifying on Capitol Hill about the security lapses that allowed a gunman to attempt to assassinate former President Donald Trump over a week ago at a Pennsylvania rally. One spectator died. Two others were wounded. Trump sustained an ear injury.