Rich Lowry of National Review Online focuses on the discussion surrounding potential impeachment of President Trump.

The collusion fantasy has officially given way to the impeachment fantasy.

The passionate investment of the Left in the Mueller investigation had much to do with shock and disbelief at Donald Trump’s victory in 2016 and the hope of early deliverance — the special-counsel probe as delectable revenge and deus ex machina.

The expectation that Robert Mueller would blow Trump out of the White House with proof of collusion with Russia has, not surprisingly, come up empty. No worries. If Volume I of the Mueller report, on Russia, didn’t pan out, there’s always Volume II, on alleged obstruction.

When you are desperate to, in the memorable words of Democratic freshman congresswoman Rashida Tlaib, “impeach the motherf—–,” any rationale will do.

If House Democrats impeach Trump, though, they will be sorely disappointed. They will wake up the day afterward and, after all the drama and wall-to-wall coverage, he’ll still be president of the United States, tweeting per usual.

House Speaker Nancy Pelosi, who has bizarrely become the backstop of reason in Democratic politics, is reluctant to go down this path. The question is whether she will get swamped by her base, just as the Republican House leadership did in 1998.