[aexer0e]

That's not a hard question to answer.

The five Supreme Court Justices who voted in favor of Citizens United and McCutcheon were all appointed by Ronald Reagan and George H.W. Bush. Had either of those two not won the presidency, Citizens United and McCutcheon would have lost their cases against the FEC.

People can still vote for representatives who want to pass legislation to undo those cases through congress. There's nothing that's stopping people from voting in representatives who are in favor of this (yet).