On September 22, GOP presidential frontrunner Donald Trump will be appearing on Stephen Colbert's new Late Show, where he has already been compared to the KKK. Now, that takes some bravado.  

Trump's appearance will be part of what looks like a major political month for Colbert. Following Trump that Tuesday night, Dr. Ernest Moniz – the Obama administration's energy secretary – will be making an appearance.

Next week, Democratic presidential contender Bernie Sanders will be making an appearance, followed by Senator Elizabeth Warren on September 23.

This week, Colbert hosted presidential candidate Jeb Bush during his Tuesday night premiere​.

Trump has already made an appearance on Jimmy Fallon with NBC, making this the second late-night talk show appearance of his campaign. The ratings for the show will certainly be the talk of the town.