JIMMY FALLON: President Obama just held the final news conference of his presidency. And at the end, Obama wished everyone a Mele Kalikimaka, which is the Hawaiian greeting for Merry Christmas. Mele Kalikimaka is also what Donald Trump tweeted when he was just trying to spell Merry Christmas. [Trump voice] 'Merry Christmas, whatever. It was in Christmas Vacation. It counts. It does. It was in it. It counts.'