Story highlights 49% approve of the way Obama is handling his job

But a majority feels Congress should reject the nuclear deal with Iran announced earlier this month

Washington (CNN) A majority of Americans want Congress to reject the recently-negotiated nuclear deal with Iran, even as President Barack Obama's approval rating continues to stand in net-positive territory for the second month in a row, according to a new CNN/ORC poll.

The new CNN/ORC poll finds 49% approve of the way Obama is handling his job, 47% disapprove, about the same as in a June survey, which found the President's approval rating at 50% for the first time since 2013. But on the President's biggest accomplishment since then -- the nuclear agreement reached between the U.S., its allies and Iran -- most say they would like to see Congress reject it. Overall, 52% say Congress should reject the deal, 44% say it should be approved.

Saul Loeb/AFP/Getty

Some opposition to the deal may be fueled by skepticism. A CNN/ORC poll in late June, conducted as the deal was being worked out, found that nearly two-thirds of adults thought it was unlikely the negotiations would result in an agreement that would prevent Iran from developing nuclear weapons.

The new poll finds a sharp partisan gap on whether Congress should approve the deal, with 66% of Republicans and 55% of independents saying Congress ought to reject it and 61% of Democrats saying it should be approved. Younger adults, who tend to lean more Democratic, are more apt to favor the deal: 53% of those age 18-34 say approve it, while 56% of those age 35 or older say reject it. There is also an education divide on the deal, with 53% of college graduates saying the deal should be approved, while just 37% of those with a high school degree or less formal education saying they think it should be approved.

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