Congress is Constitutionally a TRUMP Card…"Article I, Section 4, Clause 1:

The Times, Places and Manner of holding Elections for Senators and Representatives, shall be prescribed in each State by the Legislature thereof; but the Congress may at any time by Law make or alter such Regulations, except as to the Places of chusing Senators."

In layman's terms - at ANY TIME Congress can over ride State regulations for electing Senators and Representatives!

https://constitution.congress.gov/browse/essay/artI_S4_C1_1_1_1_2/#:~:text=C1.-,1.1.,Congress%20in%20Regulating%20Federal%20Elections&text=The%20Times%2C%20Places%20and%20Manner,the%20Places%20of%20chusing%20Senators