I have written this opinion piece for Politico.  It begins:

Can Super PACs and other outside campaign finance groups corrupt?

This question is at the heart of a case out of Montana which the Supreme Court will likely decide next term. Corruption is an urgent question for 2012 voters — as outside spending on federal elections skyrockets, and negative ads (sometimes paid for by undisclosed donors) flood the airwaves in the wake of the Supreme Court’s controversial Citizens United decision.

Though I have no confidence that it will — the Supreme Court should reverse course from Citizens United. It should recognize real evidence showing that unlimited spending by these groups can undermine society’s interest in preventing corruption and the appearance of corruption. It is time to rein in the Super PACs and the their non-disclosing cousins, political 501c4s.