Originally Posted by
dado potato
See the United States Constitution, Article VI, Clause 2.
State laws are subordinate to federal laws and regulations when there is any conflict. So if it is not possible to comply with a state law without violating a federal law or regulation, the state law is of no effect.
See also: Federalist #33, by Alexander Hamilton, and Federalist #44, by James Madison.
I agree that the actions on election day were fully in accordance with the rule of law.
Likewise, the rejection of any absentee ballots that were not postmarked before 8 PM on election day, or that were not hand-delivered before the polls closed. "There is no legal remedy", even if a voter feels that their ballot should be counted.