Many changes happen between the time a president takes office and when he leaves — and it's not just more gray hair and kids growing up. However, The Tonight Show just released a hilarious mashup of President Obama in 2016 giving advice to himself in 2009 and it shows how much doesn't change. The younger Obama has some prescient words for today's Obama, such as, "Let's face it, the easiest way to get on television right now is to be really rude." See: Donald Trump.
Outgoing Obama also offers some advice to the incoming Obama. "Always use Purell. If you don't, you're going to get a lot of colds." Once again, though, young Obama has some prophetic words for his older self. "This is not the biggest issue facing the country." The clip is short but packed with laugh-worthy moments.