J. Scott Applewhite / AP file
In this March 6, 2013 file photo, Sen. Mark Begich, D-Alaska speaks on Capitol Hill in Washington. The political climate for “Obamacare” suddenly looks brighter, possibly giving Democrats a chance to fight back on the GOP’s top issue this fall. Democrats in at least one tight Senate race are openly embracing the new health law’s popular features, but several others are holding back. Republicans say the somewhat upbeat news _ higher enrollments, and lower cost projections _ won’t do much to change Americans’ negative view of the health care law.