Nixon had completely lost the support of his own party. The Democrats had a huge majority in the House and the Senate, he was going to be impeached and removed. Goldwater and others went to visit him a few days before he resigned to inform him that he could not survive and that even they were inclined to vote against him on some of the articles of impeachment.
You fight for what is "right"!(IMHO) The complete story of "Watergate" has not been told. The Democraps were getting help from Castro and the American people needed to know. With the complete story there may not have been an impeachment.