Acting Secret Service Dir. Fierce Showdown with Sen. Hawley ... Trump Was Nearly Our JFK, I'm Not Sleeping!!!

The new Secret Service director is giving as good as he gets ... firing back at at least one U.S. Senator grilling him over his agency's failures in protecting Donald Trump the day of the assassination attempt.

Acting Dir. Ronald Rowe went toe-to-toe with Sen. Josh Hawley Tuesday, and things got extremely heated when Hawley demanded to know who Rowe had fired over the security failures in Butler, PA.

At first, Rowe calmly explained that he was waiting for the results of the FBI investigation to determine next steps -- but when Hawley barked back that there were obvious failures because the "former president was shot" ... Rowe snapped.

He fired back with a reference to the JFK assassination in Dallas, barking ... "Sir, this could have been our Texas School Book Depository. I have lost sleep over that for the last 17 days, just like you!!!"

Hawley interjected, "Then fire somebody!" ... which only got Rowe more heated.

TMZ.com

Watch the exchange play out -- the hearing continued after this, but the tone was much different, as Rowe was clearly done being a punching bag.

TMZ Studios

However, the members of Congress aren't backing down either ... as the myriad of Secret Service failures continue to sow the seeds of conspiracy.

Click here for info about our online advertising practices.