The Senate would have to have 67 votes in a majority republican controlled body to remove him. That simply will not happen -- even in the House, which is politically far more independent, the Democratic Party was not able to get a single Republican vote, and even had defectors from their own party just to authorize the proceedings at all.
You can't win an impeachment trial without broad bipartisan support, and there is exactly zero bipartisan support for this proceeding.
Nixon was a generally popular president and it took a long time for his support to start slipping. His famous line "People have got to know whether or not their President is a crook. Well, I'm not a crook. I've earned everything I've got." wasn't nearly as in poor taste as it seems in hindsight.