Nixon (most likely) wasn't complicit in the break-in, he covered it up after he learned of it.
In any case, the alleged collusion isn't Watergate. The coziness of the investigators with President Trump's political enemies and the amount of false information that the media has reported should be cause to question the purpose of the investigation.
As far as the DNC "hack", the evidence the Russia did it was a hasty, blatant forgery [0]. Julian Assange and Wikileaks have done literally everything short of outright claiming that Seth Rich was their source [1][2].
EDIT: The comment chain has gotten too long for replies, so I'll have to reply here.
@dragonwriter: The Robert Mueller, the special investigator, has ties to James Comey [3]. James Comey has been part of three investigations on the Clintons (the Whitewater scandal, the Marc Rich pardon, and the email server); in two of those, he personally was responsible for dropping the charges, both times with little explanation. I'd consider that to be suspicious at best. The fact that Mueller hasn't recused himself, as a friend of one of the witnesses (Comey) in the investigation, is good reason to question the validity of the investigation.
I'll concede that the point about the media wasn't a good one. A better one would have been that the Russia investigation is based on the Guccifer 2.0 forgery and a fabricated dossier by Fusion GPS. The Fusion GPS dossier was paid for first by Paul Singer, an anti-Trump conservative, and later by Marc Elias, an attorney for the Clinton campaign.
[0]: http://g-2.space
[1]: https://twitter.com/wikileaks/status/763041804652539904
[2]: https://youtu.be/Kp7FkLBRpKg?t=23s
[3]: http://www.cnn.com/2017/05/17/politics/james-comey-robert-mu...