Play of the Day: You Must Send This Letter To Five Other Rogue States in the Next 24 Hours

Even after a press conference Tuesday, Hillary Clinton's email scandal will not go away. The Late Show's David Letterman, at least, is happy that there's a Clinton scandal that's safe for work and also showed a new way current State Department chief John Kerry is communicating.

Also on Tuesday night, Letterman and The Daily Show took aim at the GOP Senators' open letter to Iran. Jon Stewart compared the GOP to an amorous dog, while Letterman suggested the Republican letter was merely a chain letter.

Be sure to check out Stewart's look at the history of executive agreements at 1:55.