to a chained CPI." Chained CPI, or consumer price index , is an alternative measure of calculating inflation that would lessen the cost of living increases for Social Security payments. When the president and Speaker John Boehner (R-Ohio) attempted to craft a deal on the debt ceiling last summer, Obama offered the chained CPI as a concession. Sanders is one of 29 Senators who have signed a letter to "oppose including Social Security cuts for future or current beneficiaries in any deficit reduction package." In addition Sanders has supported legislation that would enact the proposal that Obama put forward as a candidate for president in 2008, which entails putting in place a payroll tax on income over $250,000, in the process creating a gap between the current cap of $110,100 and that new level. Obama's openness to the tax proposal at the AARP forum prompted Sanders to call The Huffington Post to try and get the president's commitment to that approach. "When he says that he's willing to look at changing the cap, that's not good enough," said Sanders. "Four years ago, he told us that, in fact, that was a proper solution, and he was right. I've introduced legislation to do just that ... I think we've got to make sure that we reduce the wiggle room for the president, and he has got to make a very simple statement that, 'If reelected, I will not cut Social Security.'" By Monday morning, the Obama campaign had moved slightly in