Elections for federal office should all meet the same standard requirements no matter what state the election is held in. Statewide offices can use a different or the same standards.
Voter ID
No same day registration
Proof of Citizenship
Early Voting limited to shorter time frames.
How did the 17th amendment allowing direct election of senators in 1912 get passed if federalism was key to distributed powers with the 10th amendment staring at them all.
Because it followed the rules on passing a constitutional amendment.