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TPM‘s Brian Beutler reports that President Obama and Speaker John Boehner are considering a deal that includes indexing Social Security benefits and tax rates to chained CPI, which has risen more slowly than overall inflation. The Center on Budget and Policy Priorities, a progressive think tank, have endorsed chained CPI under conditions like those in this deal. The deal would also include an increase to the debt limit, defusing Republican plans for what Paul Krugman has called Operation Rolling Tantrum. Might this be part of a good deal?