Politico discusses campaign finance law’s past, present, and future in this article.

In a case brought by Wisconsin Right to Life, the Roberts court already essentially wiped out a McCain-Feingold ban on ads — usually negative ones — by outside groups in the last few weeks of campaigns.

If the court also reopens the door to corporate and labor donations, “you’ve lost any meaningful regulations on money and politics, except for disclosure, which would be pretty tough to undo,” said Ken Gross, a campaign finance expert.