A lot has gone on in the past 48 hours — after Ted Cruz and John Kasich dropped out of the presidential race, Donald Trump became the presumptive Republican nominee, but not before he repeated a conspiracy theory about Cruz's father being with Lee Harvey Oswald before JFK's assassination and Cruz was heckled by a middle schooler. On Wednesday, Seth Meyers took a closer look at all of these events, and how Trump became the last candidate standing.