Rushing to Defend?

Why are Republican politicians not rushing out to say not just "no" but "HELL NO" to impeachment? I am shocked, indeed even disgusted, that so few GOP politicians are stepping up to defend our President. When the guilty Bill Clinton got away with his crimes, virtually every public Democrat rose to his defense. Now, Trump's party is strangely hesitant to put their necks on the line beside the President's, even though it is obvious Trump has never committed a high crime or misdemeanor.