practically, first you need to win over the legislature and the governor if less than 2/3 of both state houses, which is going to require an election or two in some of them swing states.
If not part of the legislature or governor, what power do you have in going into a state and demanding they change their voting laws?
We have a supermajority in the legislature here in North Carolina and we just got rid a couple of activist justices on the Supreme Court. North Carolina is a swing state in which Trump won only by 10,000 votes in 2020.