WASHINGTON (AP) — Despite a late surge in sign-ups, support for President Barack Obama's health care law is languishing at its lowest level since passage of the landmark legislation four years ago, according to a new poll.The Associated Press-GfK survey finds that 26 percent of Americans support the Affordable Care Act. Yet even fewer — 13 percent — think it will be completely repealed. A narrow majority expects the law to be further implemented with minor changes, or as passed."To get something repealed that has been passed is pretty impossible," said Gwen Sliger of Dallas.