Let me count the ways that Democrats cheat:

Illegals voting (especially in California where voters can register at the DMV without proof of citizenship).
Green card holders voting.
Dead people switching parties and voting posthumously.
People voting in more than one state.
Stealing mail-in ballots.
Voting multiple times.
Rigging voting machines.
Buying votes.
Simultaneous registration and voting.
Stealing/losing ballot boxes.
Using lawfare to stymie voter ID laws.
Intimidating voters at the polling booth.
Endless recounts as new ballot boxes are discovered.

I’m sure I missed some.