Of all the interlocking mysteries of the Trump-Russia scandal, one that I’ve found particularly perplexing is the utter servility of congressional Republicans before a president many of them hate and believe to be compromised by a foreign power.

Yes, I know they’re thrilled about tax cuts and judges. Given how Russia has become a patron of the right globally over the last decade, some Republicans might welcome its intervention into our politics, believing that the Democrats are greater enemies of the Republic. And some are just cowards, afraid of mean tweets or base blowback.

But that doesn’t explain why, for example, Speaker Paul Ryan, a Russia hawk who is retiring in January, allowed his party to torpedo the House Intelligence Committee investigation into Russian interference in the election. Ryan, after all, knows full well who and what Donald Trump is. In a secretly recorded June 2016 conversation about Ukraine, obtained by The Washington Post, the House majority leader, Kevin McCarthy, said, “There’s two people I think Putin pays: Rohrabacher and Trump.” Far from disagreeing, Ryan said, “What’s said in the family stays in the family.” If he were patriotic — or even if he just wanted to set himself up for a comeback should Trump implode — he would have stood up for the rule of law in the Russia inquiry. It’s hard to see what he got in return for choosing not to.

This week, however, a new possibility came into focus. Perhaps, rather than covering for Trump, some Republicans are covering for themselves.