Nixon screwed up, there's no defense for that.
However, it's pretty obvious this guy did what he did because he got passed over for J. Edgar Hoover's job. He's hinted at that several times. He said before he felt like he did the wrong thing.
The truth is, he could have, and should have, dealt with the Nixon problems through legal channels. There's no doubt he could have brought Nixon down without the help of Woodward and Bernstein.
His FAMILY pressed him to reveal his actions now. One of his children, or grandschildren, has flat out admitted that she pressured him into this, so she and the family could get the money now. I think she wants ot pay off debt she ran up for her
children's education.
What does that make him? A man. Not a traitor, not a patriot. Just a man. Nothing more, nothing less.