A federal court extended a lifeline to Stacey Abrams and other candidates in Georgia on Tuesday.
Arizona and Georgia are leading examples.
And what to do if something goes wrong this Election Day.
The state official overseeing the race, a known voter suppressor, won a GOP runoff this week to be the Republican nominee.
Open primaries, early voting and automatic voter registration are key steps that states can take, according to the progressive think tank co-founded by Jane Sanders, the wife of Sen. Bernie Sanders.
In the last election, there were more than 224 million citizens over the age of 18 in the U.S., but only 157 million were registered voters, and even fewer actually voted.
"Just like we did, the students are taking a stand for their own humanity and they won't be stopped," says Yoli Rios, 67, who walked out of class 50 years ago in Los Angeles to protest dropout rates and paddle beatings for speaking Spanish.
If the justices go with Ohio Secretary of State Jon Husted, it would mean Republicans like him throughout the U.S. will be able to scrub millions of citizens from the voter rolls.
Trump has called for a probe into voter fraud during the 2016 election, even as new evidence shows that one of his daughters and one of his top aides hold dual-state registration.