Baloney. A compelling case could be made that Clinton and Lewinsky was the biggest. It was certainly the sleaziest and most tawdry.
Nobody drowned at Watergate.
Burglary, obstruction of justice, the President’s personal lawyer raising hush money to pay off witnesses . . .
The Clinton/Lewinsky was indeed tawdry, disgusting, morally reprehensible, and scandalous, but the Nixon White House was full of all-out lawbreakers. I wish it weren’t so, and wished so at the time, but what they did is indefensible.
As for potential as “biggest” scandal, I think Post #5 nails it, but I don’t know if we’ll ever know the truth.