You hit the nail on the head. Clean up the registration rolls, and require ID that can only be obtained with proof of citizenship.
Those who oppose this want voter fraud.
This is what the Trump Revolution is about: law, truth, justice, liberty--revolutionary concepts in the decadent phase of Western Civilization.
We live either under law or under the law of the jungle. The radical left advocates the law of the jungle. War is the law of the jungle.
As for truth and liberty, the radical left has only contempt for them, as they interfere with the perverse version of justice that the left embraces.
Whether or not truth, liberty, justice, and law will prevail, or whether the law of the jungle will prevail, remains to be seen. Half the USA and most of the world seem to prefer the law of the jungle.