One year after the near assassination of Donald Trump, a deep frustration has set in at the Secret Service over the agency’s response to the security failures of that day.

The protective agency also received $1.2 billion, in part for recruitment and retention, from the One Big Beautiful Bill Act.

Kimberly A. Cheatle, who resigned after Donald J. Trump was grazed by a bullet as a candidate a year ago, pushed back against findings in a Senate report released on Sunday.