You don’t see parallels to Watergate. Congress wasn’t willing to invesitigate until the public become overwhelmed after a year of drip drip drip of tidbits from Bernstein & Woodward.
At this point, I think if anything happens (huge *IF*), it will be after he has left office, or will drag out until he is out of office, and will be more of a formality to append the history books - the damage having already been done.
But by all means, I would dearly love to be surprised or proven wrong!