"Senator Sherrod Brown is joining the push to expand Social Security, and he’s making a startling argument: Dems should go on offense on entitlements, rather than let Republicans and Beltway fiscal scolds frame the discussion as one over how much benefits should be cut, not one over whether they should be cut at all.

“There are two fundamental numbers that make this a moral case for Democrats to make,” Brown told me in an interview today. “One is that a third of seniors rely on Social Security for virtually their entire income. The other is that more than half of seniors rely on Social Security for significantly more than half their income.”

Brown is endorsing Tom Harkin’s bill to expand Social Security benefits, which would boost benefits for beneficiaries by $70 per month, change the cost-of-living calculation to keep pace with rising costs of things seniors need, and scrap the payroll tax cap to strengthen the program over the long term. The crusade to expand Social Security got started with liberal bloggers such as Atrios began pushing for it, and gained some momentum when liberal groups such as the Progressive Change Campaign Committee began mobilizing behind the idea. . . . "

The Washington Post: Liberal push to expand Social Security gains steam