Nixon resigned over an obstruction of justice charge (with some of the legal groundwork prepared by a young Hillary Rodham). Nixon resigned gracefully, the media declared the incident over and Gerald Ford declared that it was time to "put the whole affair behind us and move forward". This was done because the last thing anyone wanted in Washington D.C. was an impeachment trial. Even Nixon's worst enemies dared not allow it. The reasoning was simple. Sooner or later, someone would ask the following question.
"Why, when Nixon's re-election was a study in foregone conclusions, was it necessary to break into the DNC headquarters at the Watergate?"
The answer to that question, never asked by politician, never asked by a servile media, was THE dark secret that could not be revealed; the secret that would have brought down the entire government!