Justice Ruth Bader Ginsburg wants Citizens United overturned, What does that mean?

From the WSJ:

Her other goal is overturning Citizens United v. FEC, which in 2010 restored First Amendment rights for businesses and unions. “It would be an impossible dream. But I’d love to see Citizens United overruled,” she said, thus signaling she’ll do everything she can to see that happen. She also boasted that she expected to be back in the five-vote majority soon. . . .

Overturning Citizens United would allow the government to ban movies, TV, and books 60 days before elections. During presidential election years the government could ban all these things for almost 10 months.