I've called it a while back. Make a database of people's political affiliation using social media posts and other sources. Have agents sit outside polling places with facial recognition technology that flags anyone on that database that is likely to vote Democrat and detain a number of them until the polling ends then release them without charge. This prevents them from voting and can have a significant impact on the outcome of the elections.
On top of that they're going to have mail in ballots thrown out, further interfering with free and fair elections.
This is coming. Trump knows he will have his ass absolutely handed to him in the mid terms given his well-deserved abysmal approval rating. Better fight back now.
And if the US ever manages to recover from this blatant establishment of a dictatorship, every single one of those who participated at this should be charged at the fullest extent of the law. There is no claiming ignorance of what they're doing. Even floating the idea of sending ICE to arrest people at polling places is a violation. They know damn well that they're rigging the election.
As long as the DOJ is controlled by Trump they won't charge him over anything no matter how blatantly he is rigging the election in his favor and how obvious it is that he should have lost.