This is a flat, substabtial interface with the 10th Amendment’s allowance of states to manage and run elections. If a state allows elections such that they aren’t denied on account of race, gender, and people under 18, they can be run however the states deem. Requiring someone to register with the federal government is not a power of Congress
It’ll be shot down in the courts, while Trump cronies ignore it and fuck up the elections anyway. They don’t care, if they stay in power the court rulings won’t matter.