Clinton backs Philly's paid sick leave

Could this be a clue to Hillary Clinton's 2016 platform? If there is one?

On Thursday, the same day Philadelphia won the Democrats' next presidential nominating convention, Mayor Michael Nutter signed into law a paid sick leave bill. And guess who likes it: Clinton tweeted her approval today.

Other cities with paid sick leave laws include New York, Seattle, Portland, Ore., and Oakland, Calif.

Clinton has already expressed support for state sick leave laws, which currently exist in California, Connecticut and Massachusetts. "We need to get paid leave provisions on every state ballot by 2016 that we can possibly manage to do," she said in a December speech at the Massachusetts Conference for Women. When she was in the Senate, she backed a bill to require paid sick leave for businesses that employ more than 15 workers. Now President Obama is pushing for a federal paid sick leave law. He mentioned it in his State of the Union address last month and a bill has since been introduced in the House.

Clinton hasn't had a heavy public schedule lately, and fundraising efforts for her proto-campaign are meeting with tepid response, but she has been edging into the public debate on some issues. On Thursday she teamed with Republican Bill Frist, the former Senate Majority Leader, to write an op-ed urging Congress to renew the Childrens Health Insurance Program. Earlier this month, she poked Republicans who questioned mandatory vaccines with a mildly mocking tweet: "The earth is round, the sky is blue and vaccines work.''