I put that question to a dozen Republicans in the House and Senate, a mix from across the ideological spectrum and from every region of the country. The conversations revealed a lot about the Trump GOP, but the red line, with respect to Trump’s behavior generally, or his conduct specific to the Mueller probe, was vanishingly thin and difficult to detect. And every time you think you see it—pee tape, porn-star liaison, erratic diplomacy, threats to fire Mueller—it keeps moving. As Republican senator Jeff Flake of Arizona put it, “I don’t know that there is one.”…

Jenkins, the congresswoman from Kansas, relayed a conversation she recently had with a factory owner back home, who told her that while the guys on his shop floor “hate” Trump—they are from the Bible Belt, after all, she noted—“they love what he’s doing.” She then offered the most honest explanation I’ve heard for this phenomenon. “It’s kind of like supporting your favorite team and there’s a talented trash-talking personality on the other team,” she said. “That player is the worst human being on the face of the earth, but if that same talented player is on our team, well, you know, they’re our team, so we give him a pass.”