Updated

A record number of voters want the 2010 Affordable Care Act repealed entirely, while sizable majorities say they are worried about their health care under the new law and expect their medical costs will go up, according to a new Fox News poll.

The poll, released Wednesday, finds that 58 percent of voters favor repealing all (39 percent) or some (19 percent) of President Obama’s signature legislative achievement.

Another 19 percent would leave the law as is, while 17 percent would expand its coverage further.

The 39 percent who want to repeal the health care law entirely is a record high, up from 30 percent who felt that way in March 2013.

The differing views follow partisan lines: Most Republicans favor repealing all (65 percent) or parts of the health care law (18 percent), while most Democrats want to see the law expanded (31 percent) or kept in place as-is (30 percent).

A 62-percent majority of independents favors repealing at least some of the law.

Nearly three times as many voters say the health care law makes them feel more worried (66 percent) rather than reassured (23 percent).  And the anxiety is rising -- the number feeling worried is up 15 percentage points since July 2012, soon after the U.S. Supreme Court ruled the law constitutional last year.

Almost all Republicans (87 percent), a sizable majority of independents (71 percent) and a plurality of Democrats (46 percent) say Obamacare makes them feel more worried than reassured.

Democrats (42 percent) are six times as likely as Republicans (7 percent) to feel more reassured by the law.

Concern is widespread, as more than 60 percent in every age group feel worried about their health care in the future.  It peaks at 70 percent among those ages 65 and over.

Overall, 65 percent of voters think their health care costs will increase under the law.  Few -- eight percent -- say their costs will go down, while 24 percent thinks costs will stay about the same.

The president gets poor marks for the job he’s doing on health care:  41 percent approve, while 55 percent disapprove.  Even so, there’s only one issue area where Obama’s approval is higher and that’s on his handling of terrorism (52 percent approve and 41 percent disapprove).

The Fox News poll is based on landline and cell phone interviews with 1,012 randomly chosen registered voters nationwide and was conducted under the joint direction of Anderson Robbins Research (D) and Shaw & Company Research (R) from June 22 to June 24.  The full poll has a margin of sampling error of plus or minus three percentage points.