As President Barack Obama’s signature Patient Protection and Affordable Care Act enters the all-important sign-up phase next week, the president finds himself with some of the lowest approval ratings of his presidency even as Republicans in an unpopular Congress maneuver to block the health-care legislation from taking effect.

A Reuters-Ipsos poll of 1,729 Americans taken Sept. 20-24 found only 39 percent of those surveyed approve of the job Obama is doing as president, while 55 percent disapprove.