Last night, Stephen announced that he is exploring a run. Alas, he can't:

Colbert could not get on the ballot in South Carolina – the November 1 deadline for doing so has come and gone – and the state does not provide a space for write-in votes in primaries. "South Carolina state law does not allow any write-in ballots in presidential primaries. There is no blank space on voting machines to write in a candidate," said Matt Moore, executive director of the South Carolina GOP.