It must be nerve-racking to meet the President. What if you are walking up to show him your new pen and you slip on the rug and stab him in the knee with it? You would have stabbed the president – that has to be against the rules. It’s probably in the Constitution – Thou Sha’ll Not Stab The President, Accidentally or Not Accidentally. Seth Meyers was on Letterman last night to explain how he totally blew his chance to shake the man’s hand at last year’s White House Correspondents’ Dinner. Also, after the jump he explains how Donald Trump has still not forgiven him for a joke he told, despite the fact that Trump is currently living as a walking punchline.