Citing concerns about the risks to Procter & Gamble’s brand, reputation, and shareholder value, NorthStar Asset Management Pension Plan is asking shareholders to weigh in on P&G political spending at the annual meeting on October 11.

The battle against the effects of the Supreme Court’s game-changing Citizens United decision, the ruling that ripped down the wall between corporations and American elections, is gathering steam among an unlikely group: investors. With Congress unable to pass new legislation and the Obama administration so far unwilling to fix the dysfunctional Federal Election Commission, it’s corporate shareholders who are increasingly on the front lines of the effort to foist accountability on the new Wild West of political spending.

Home Depot has released their annual proxy including a resolution calling for a shareholder vote requesting that political contributions reflect Home Depot’s stated corporate values. The resolution, filed by NorthStar Asset Management, Inc. of Boston, was filed in the aftermath of Citizens United v. Federal Election Commission, the controversial Supreme Court decision in January of 2010 that removed prohibitions on corporate electioneering contributions.