What's the point?
It's been proven beyond a doubt that Johnson did whatever it took to win, including dirty tricks and stuffing ballot boxes. He was a bully and many other bad things.
None of which excuses Nixon or his henchmen.
Can I assume you are one of the Hillary voters on here from your comments? Comparing Nixon and LBJ -- not even close. Nixon covered for his staff because he was loyal to people around him -- LBJ was involved in every detail of bugging the Goldwater campaign and dirty tricks and that doesn't even include his micromanaging the the war in Vietnam.
Watergate was a 3rd rate burglarly at best -- LBJ bugged everything in the Goldwater campaign not to mention stealing ballot boxes in Texas in his first campaign for Senate.
"What's the point?"
In my opinion, the point is that the Watergate story is a story about the media, not the Nixon presidency and administration. It shows that the media was already completely one-sided more than 30 years ago.
We now know that the "Watergate" many of us were raised on was BS. The real story is how a disgruntled federal employee feeding dirt to a Red-Diaper (Doper) Baby working for a major paper can bring down a government.
The point is that the media completely ignored the corruption on the part of the Democrats, especially today in their retrospectives. Had Watergate pulled down a Dem president, every report on it on ABCBSNBCNN would have a disclaimer in the 2nd sentence about how "Of course previous Republican administrations had engaged in the same illegal activity." It isn't about excusing Nixon, but further exposing the media 'coverups'. There is such a thing as 'lying by ommission'.
Excuses them from what, exactly? What crime did Nixon do?