Let me generalize like this.....I don't even need your "exact" proof. Common Sense is all that is required.
Democrats want open borders essentially - offering sanctuary to anyone who gets here ILLEGALLY
Then democrats have worked furiously to provide driver licenses to as many of those as possible (hmmm...driver license = voting)
Now Democrats are mailing millions of ballots to everyone. That is a recipe for disaster that would allow unscrupulous players
in California, newyork, Washington state etc to essentially hand pick the winners.
In addition, there are many actual cases of democrats cheating. But I'll make it easy for you and tell you that Search Engines have your answer.
Trump simply wants QUALIFIED AMERICANS to vote and to ensure the process is fair, honest and transparent.
The exact opposite of what the left wants.