Last Week Tonight fans tuning in Sunday likely knew what they were in for: a blistering monologue about Donald Trump’s handling of the James Comey situation. After Trump fired the F.B.I. leader last week, a flurry of damage control soon followed—but Trump dashed those efforts in record time when he sat down with Lester Holt, undoing, as John Oliver put it Sunday night, “two days of damage control in two sentences.” Trump also claimed that the F.B.I. director told him on three separate occasions that he was not under investigation. But Oliver was more than a little skeptical—in fact, he called “turbo bullshit” on that.

“What are you doing?” Oliver asked after rolling a clip of Trump explaining why he fired Comey—and mentioning Russia in the process. “‘I was thinking of the Russia investigation when I fired Comey’ is the one thing that you are not supposed to say out loud. It is the kind of response that makes you ask three questions: one, can he really be this stupid; two, does he really think we as a country are this stupid; and three, are we as a country this stupid? And it’s entirely possible the answers to all three questions are yes.”

There are a few paths forward here, Oliver noted—but no matter how you slice it, Congress will need to stand up to the president. “At the very least here, they need to acknowledge that what happened is fucked up, and not continue to give non-answers like the one Paul Ryan did” when asked about Trump’s threat against Comey on Twitter: “James Comey better hope that there are no ‘tapes’ of our conversations before he starts leaking to the press!”

Ryan declined to comment on the tweets, Oliver noted, and said the president had the right to hire and fire an F.B.I. director. “It’s honestly incredible to watch a man who spends 90 minutes every morning working out refuse to show any strength whatsoever. Apparently, no part of P90x targets the backbone.”

“The point is, the founding fathers created a system of checks and balances to limit the power of the president,” Oliver added. “But it only works if someone fucking checks or balances. And if you don’t, it’s no longer on Trump. It’s on you. Because when you’ve got the presidential equivalent of a five year old shitting on the salad bar of a Ruby Tuesday, at some point you stop blaming the five year old and you start blaming the people who are not stopping him. Stop that boy. That’s what I’m saying. Stop that boy now.”