The Late Show host will join Kamala Harris for a Biden Victory Fund fundraiser on Monday. "Colbert has been a frequent critic of President Donald Trump, and while it is somewhat unusual for a late night host to participate in a campaign event, it is not unprecedented," says Deadline's Ted Johnson. "Jimmy Kimmel, Colbert’s rival on ABC, participated in a rally for Democrats in Nevada in the closing days of the midterm elections in 2018. When he was hosting The Tonight Show, Jay Leno appeared at a victory event for Arnold Schwarzenegger’s gubernatorial campaign in 2003. Leno has done multiple fundraisers for Biden this cycle."