This election year is really heating up.
Earlier this year, Jimmy Kimmel launched a faux-vice presidential campaign on his late night show, Jimmy Kimmel Live!, and this week, the comedian's mortal enemy, Matt Damon, released a hard hitting attack ad aimed at taking him down.
In the video, Damon goes after the late night host's long-running bit of "running out of time" for him, questioning his honesty.
But like a true politician, Kimmel, 48, gets out ahead of the ad by going on the offensive -- making fun of the 45-year-old actor's recent man-bun.
Watch the hilarious ad below.
This is not even close to the first time the two frenemies have taken their long-held rivalry public.
In February, Damon crashed Kimmel's post-Oscars special by hiding underneath Ben Affleck's coat.
Watch the video below.