For the left, winning is everything. They couldn’t care less if they cheat.
It's even more sinister than that. The left is intentionally trying to undermine people's confidence in the entire process. They want it gone. They don't care if they get caught because their goal is not to really win, as much as it is to destroy the entire American concept. Blatant voter fraud actually furthers that objective more than just winning does. If they win, good, if they tear down the system in the process, outstanding! Either way, they win. They do not care about American democracy. It is simply a tool to be used to wreck the country.
The next step is to figure out a way to convene a constitutional convention. But first they need to demonstrate to the people how ineffective the "old" constitution is.