WATCH: John Oliver Asks ‘How Did We Get A Pathological Liar In The White House?’

John Oliver is back, and not a moment too soon.

In the first episode of Last Week Tonight which aired on Sunday John Oliver spent almost the entire episode on Donald Trump.

Oliver noted that Trump clearly struggles with the truth, which includes basic reality. Oliver notes that Trump even claimed that it didn’t rain during his inauguration speech, when video clearly shows that it did. “That’s where we are currently at,” said Oliver. “We have a President capable of standing in the rain and saying it was a sunny day.”

Oliver also noted “He also takes information in from frighteningly unreliable sources such as Breitbart, the organization which gave us Steve Bannon—now Trump’s chief strategist.”

Oliver went on to say, “Bretibart has published such Pulitzer-eligible stories as ‘Birth Control Makes Women Unattractive and Crazy,’ ‘Racist, Pro-Nazi roots of Planned Parenthood Revealed,’ and ‘Hoist It High and Proud: The Confederate Flag Proclaims a Glorious Heritage.’ You know, the kind of headlines you see your old high school friends share on Facebook and think, Oh, that’s a shame! I guess Greg sucks now.”

And in one of the most hilarious announcements from Oliver, John Oliver said he will be placing a series of ads on early morning TV in the Washington DC area, hoping to teach Donald Trump some facts.