"What, in your opinion, might those shenanigans entail ?"
Voting machines not working.
Voter intimidation.
Lack of bi-partisan oversight.
Ballots found in the street.
Lack of signature checks.
No chain-of-custody.
Vote counting delays.
etc etc
"Grouped by party would assist." - not really, it's a systemic crappiness rather than party-specific.
