John Oliver went hard at President Donald Trump and Attorney General Jeff Sessions on Sunday's "Last Week Tonight," blasting those wiretapping allegations as well as Sessions' bizarre recusal from Russia investigations.

"We begin this evening with President Trump: two words that still simply do not belong together, like 'baby pubes,' or 'haunted horse," Oliver joked during the segment (above).

Oliver noted that the week began promisingly for Trump because of his first "presidential speech," but things went downhill fast after Sessions' recused himself from any investigations into Trump's possible ties to Russia.

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"That was an unforced error," Oliver said of the Sessions mess. "He wasn't even asked whether he'd met with the Russians. He just implicated himself out of the blue, which should have been immediately suspicious. If you ask someone how their weekend was, and they say, 'Well, I definitely wasn't masturbating into the Slurpee machine at the 7-Eleven,' you check the f--king security cameras at the 7-Eleven and you don't act surprised."

"Look, it is not clear what is really going on here yet, although one possibility is that this all amounts to what I’m going to call Stupid Watergate, a potential scandal with all the intrigue of Watergate, except everyone involved is really bad at everything," Oliver said. "And the relevant question isn’t so much, ‘What did the president know and when did he know it?’ as it is, ‘Is the president physically capable of knowing things at all?'"

Oliver analyzed the President's terrible week, which culminated in Trump's accusation that Trump Tower was wiretapped by former President Barack Obama.

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"OK, let me give you some context for where we are," Oliver said about the president's wiretapping allegations. "In 1992, Dan Quayle misspelled 'potato' and it became one of the most famous dumb moments in political history. But we are now at a point where the president is so busy hurling destabilizing conspiracy theories around we can't even pause to enjoy the fact that he misspelled the word 'tap.' And his evidence for suggesting President Obama committed a crime seems pretty thin."

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