Quinn, de Blasio collect more big name endorsers

Christine Quinn and Bill de Blasio picked up key endorsements in their campaigns for the mayor's office.

Planned Parenthood Political Committee of NYC said it backs Quinn because she would help New Yorkers get more access to sexual health services.

Economist and Nobel Peace Prize winner Joseph Stiglitz said he endorsed de Blasio because of his strong economic plan for the city.

Both candidates have topped the polls among Democratic candidates over the last few weeks.