I just wrote about the latest Republican challenge to the McCain-Feingold soft money limits. The case is teed up to the Supreme Court:

No more Justice Scalia means that Court is likely evenly divided at best on the question. So little prospect now the ban would be overturned.

If we get a ninth Justice things could change. A Clinton-appointed Justice would almost certainly vote to uphold the limits, while a Trump-appointed Justice would almost certainly vote to strike them down.