Nixon was not facing impeachment for the break in, or even the cover up of the break in. It was his cover up of the cover up that did him in, using the CIA to stop the FBI from investigating further.
Bill Clinton wasn’t impeached because he got a blowjob, he was impeached for perjury and obstruction of justice for his own lying about it and for pressuring Lewinsky to lie about it. That’s the argument that the congressional Republicans went with to try and force him out of office.
Trump is likely to never face any question of violating the law by talking to Russia or its surrogates. But he’s dumb enough to accidentally obstruct justice, which he may have done by firing James Comey to stop the investigation. I doubt enough Republicans would vote to impeach, but try telling that to the idiot fucking Clintonites desperate for any excuse that would exonerate the dumpster fire of the slay queen’s campaign.