Naaaah, it’s a myth created by Republicans.
According to Gregg County Elections Administrator Kathryn Nealy, 231 out of the 800 mail-in ballots that swung the election, bore the signatures of the five same people who helped voters with their ballots. Furthermore, 1/3 of the voters claimed they had a disability in order to qualify for absentee or mail-in voting.
The vote harvesting scheme worked and Brown actually won!

What two characteristics do these cheats have in common?
They are black and they are Democrats.
And the evidence of the court is?