Because They Cheat Vol. 13

Jim Hoft has the details from Minnesota:

Upwards of 100 residents from a local group home for mentally disadvantaged individuals were brought into the County Courthouse to cast absentee ballots. The witness reported that supervisors were telling voters to cast a straight Democrat ticket. There was even a report of a voter prematurely leaving the voting both and a supervisor casting the ballot for the voter. Essentially, the people in-charge were taking advantage of the mentally disabled in order to bolster the vote for their candidates of choice. These individuals involved can be charged with a felony under Minnesota election laws.

There's video at the link.

I guess some would argue that you have to be somewhat mentally incapacitated to vote for Democrats anyway.