19, 2009 -- Senator Ben Nelson, a conservative Democrat, becomes the 60th vote needed to permit the Senate version of the health care bill. December 24, 2009 -- The Senate passes its health care bill 60-39. January 17, 2010 -- Obama stumps for Martha Coakley in a Massachusetts Senate race beside Scott Brown to replace Kennedy. Brown had promised to vote against Democratic health care labors. January 19, 2010 -- Brown wins the special election, risking the health care law. February 25, 2010 --…