Idiot why would the man who brought down Nixon kiss the ass of Bush?
1) He didn't really bring down Nixon.
2) Nixon was a long time ago.
Here's the thing. Woodward (and Bernstein) did reporting. The real action was with politicians who finally got Nixon (who wasn't that bad of a guy, really) to see that his political position was untennable.
The guy who ultimately brought down Nixon was Nixon. He made the decision that fighting to stay in office would do more damage to a country in turmoil than stepping aside would.
You have to honestly wonder about some things around Woodward. He claimed for decades that "Deep Throat" was a concerned whistleblower when he was in fact a mediocre bureaucrat upset he had been passed over for promotion.
Woodward has always struck me of a guy who acheived fame as a young man and then spent the rest of his life trying to recapture that magic moment. (He was only 31 when Nixon resigned.)