“Bad, and very boring singer, Bruce Springsteen, who looks like a dried-up prune who has suffered greatly from the work of a really bad plastic surgeon, has long had a horrible and incurable case of Trump Derangement Syndrome,” President Donald Trump wrote. “The guy is a total loser who spews hate against a President who won a Landslide Election,” Trump added. “MAGA SHOULD BOYCOTT HIS OVERPRICED CONCERTS, WHICH SUCK. SAVE YOUR HARD-earned MONEY.”

Last week Trump and Jimmy Kimmel exchanged online barbs over the comic’s jokes about Markwayne Mullin and plumbers – which the president and MAGA felt mocked plumbers and working class Americans as a whole – a demographic that at least used to be Bruce Springsteen fans.

“You have 30 to 40 years of de-industrialization and globalization of the economy, so there are a lot of people who were left out of that,” Springsteen said. “Voices have been fundamentally ignored and not heard. These are folks who feel Donald Trump has been listening to them and speaks for them on some level,” according to a Los Angeles Times report.

Springsteen opened the tour with pointed remarks about the current political climate, telling the crowd, “We are here in celebration and defense of our American ideals.” He continued, “Democracy, our Constitution, and our sacred American promise, the America that I love, the America that I’ve written about for 50 years, that’s been a beacon of hope and liberty around the world, is currently in the hands of a corrupt, incompetent, racist, reckless, and treasonous administration.”

In September 2016—just two months before the election—Bruce Springsteen took aim at Donald Trump in an interview with Rolling Stone, calling him a “moron” and warning that the republic was “under siege,” which he described as “a tragedy for our democracy.”

The latest clash ultimately underscores how Jimmy Kimmel has once again positioned himself at the center of the cultural and political divide, this time using his platform to amplify support for Bruce Springsteen.

As the feud with Donald Trump continues to escalate, Jimmy Kimmel’s vocal backing highlights how celebrity voices are increasingly fueling the broader national conversation – even as celebrity endorsements of political candidates appears to make little difference in elections.