This has been a popular topic in the past, so while there is always more that can be said, here are a few past threads which are related and might be of interest for you:

"Did Richard Nixon have apologists in the press throughout the Watergate scandal? If so, did those journalist lose credibility after Nixon resigned?" answered by /u/the_alaskan

"Where there those who didn’t believe that Nixon’s crimes didn’t meet the threshold of ‘high crimes and misdemeanors?’" answered by /u/vpltz

"Were there hardcore, dogged Nixon supporters who denied that he was involved in Watergate even after he resigned?" answered by /u/thehuscarl