The Supreme Court decision upholding the 2010 health care law has left more American voters feeling "worried" than "reassured" about their personal health care situation. Meanwhile, majorities still want at least part of the health care law repealed.

The latest Fox News poll, released Thursday, shows 58 percent of voters think the Affordable Care Act needs to be changed and Congress should keep at it. Forty percent disagree: It's done and lawmakers should "move on."

Not surprisingly, most Republicans (84 percent) think lawmakers should keep working on the law. A 53-percent majority of independents agree -- as do 35 percent of Democrats.

Overall, a 57-percent majority of voters would like Congress to repeal at least part of the health care law: 29 percent want complete repeal and another 28 percent favor repealing parts of it.

That's down slightly from a high of 61 percent wanting to repeal at least part of the law in January 2011. Since 2010, when this question was first asked, a majority has favored repealing at least some of the law.

Of the four voters in ten who want Congress to keep or expand the law, 18 percent favor expanding it, while 22 percent say leave it as is. That's a new high for the number favoring keeping the law in its current form, up from the previous high of 16 percent (in both April 2011 and December 2010).

Almost all Republicans want Congress to repeal all (57 percent) or parts of the health care law (30 percent).

Two-thirds of Democrats want the law expanded (29 percent) or left as-is (36 percent). One in four Democrats favors repealing parts of the law (24 percent).

Among independents, a 57-percent majority thinks at least some of the law should be repealed, while 39 percent favor keeping or expanding the law.

The Supreme Court ruled most of the 2010 health care law constitutional on June 28.

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Voters 'Worried' About Health Care After Ruling