Congressman Madison Cawthorn is LIVID over Gwen Berry's anthem protest ... calling it "disgusting" and telling TMZ Sports the hammer thrower should be booted from the country's Olympic team over it all.
The North Carolina rep didn't mince words when we got him out on Capitol Hill on Monday ... ripping Berry for her demonstration during the playing of "The Star-Spangled Banner" at Saturday's 2020 U.S. Olympic Track & Field Team Trials in Eugene, OR.
"It's laughable!" the 25-year-old politician said. "I mean, literally, it's just the easiest thing to do!