Here's what Ed Kilgore at NY Magazine had to say:

"The bottom line is that Trump has a much better chance of getting through this “crisis” than Nixon did when he “massacred” a special counsel and the Justice Department officials defending him. The key thing to watch is whether congressional Republicans decide in large numbers that Trump’s stonewalling over Russia and his generally imperious habits are endangering their grip on the Legislative branch in 2018. If and when that wall breaks, and the GOP no longer feels a need for solidarity with its president, then depending on what is underneath all the furor, Trump and his associates could be in real trouble."

But that's a big "IF." Isn't it a sorry indictment that when the Republicans in Congress are staring at the very real possibility that high treason has been committed by the Republican president, the one and only thing that will absolutely ensure that they do the right thing is craven self-preservation. Pathetic.