Some 56% of Americans disapprove of Obamacare, the most ever, a Gallup poll released Monday shows. A record-low 37% of those surveyed support the health reform law. The poll was released two days after health insurance enrollment began for 2015 and a week after the midterm election, where Republicans retook the Senate. Several Republicans, including the leaders of the House and Senate, have called for overhauling or repealing Obamacare. Obamacare fans have not outpolled foes since early 2013. The latest dip in the approval rating could signal a loss of faith in health reform after the midterm election, Gallup said.