So is this a preemptive strategy to get people to question the legitimacy of the 2018 elections if the Democrats take the House?
No.
This is merely reporting that the arrangements to enforce one Citizen one vote principle being made to be reality.
It is a given that tight monitoring and facial recognition programs will be features of this election. Let the furor over that necessity wax and wane now. If the Democrats take the house, they will have done it honestly. Either way, people violating voter laws are not going to skate by undetected or uncharged after November.