I understand what you're saying, but there's one big (D)ifference between this and anything Democrats would do to a Republican.
And that difference concerns which party has total control of the "mainstream" media. If Harris were a Republican, then this would be Worse Than Watergate with wall-to-wall coverage to damage the Republican as much as possible.
Since Harris is a Democrat, and "black", and a female.... you already know how coverage of this is going to go. Just like the reverse scenario, the media coverage will STILL endeavor to damage the Republican (party) as much as possible, and it will succeed.
It's a moot point, probably. There will be some quickie vote, the vote will fail, the case will be closed. OTOH if Democrats were as shrewd as they think they are (they aren't shrewd, they're just evil; it's only that the GOP is so stupid that the Rats LOOK smart by comparison), they'd vote for some kind of investigation and then sit back as Republican candidates become more and more unpopular with each passing day.
You have a point there. I wonder if they are thinking when the tough questions come for Harris, will she play the race card to avoid answering.