Kimmel also slammed Trump's White House over errors leading up to the visit by the World Series Champion Boston Red Sox.
Kimmel began by telling his audience about a bill that the New York state Senate passed Wednesday that would assist Congress in retrieving the president's tax records.
"The New York state Senate yesterday passed a bill that would allow Congress to finally see Donald Trump's tax returns, which would mean... nothing. It will make no difference whatsoever," Kimmel said. "It's not that we don't know he's a fraud -- everyone knows that. The problem is half of America doesn't care."
The ABC star went on to compare the effort behind getting Trump's tax returns to World Wrestling Entertainment.
"Democrats don't realize, it's basically the WWE. It's wrestling," Kimmel continued. "They're busy trying to prove that the Undertaker isn't an actual undertaker. Like, 'Hey, this guy has no license to practice funeral directing in any state.' And the Republicans are like, 'Uhuh, yeah, we know. Do you mind stepping aside so we can watch him hit someone with a folding chair? Thank you.'"