All national monuments designated since 1996 are now under review following Trump's executive order on Wednesday -- and the big, big stone heads of Mount Rushmore are not pleased.
The four presidents kicked off the Late Show on Thursday, offering a few guesses as to why Trump would want to jeopardize some of the country's most beloved landmarks.
Perhaps the scariest? To put a reasonable facsimile of his own head on Mount Rushmore, too.
Topics Stephen Colbert Donald Trump
