Most Americans would vote to disapprove the Iran nuclear agreement if they were members of the U.S. Congress, according to Fox News Poll results released Friday. Opposition to the deal has been strong since it was announced July 14, with many saying they feared the country would not adhere to the terms of the deal.

The nuclear agreement was negotiated between Iran and the P5+1 group of world powers: China, France, Russia, the U.K. and the U.S., plus Germany. It would end sanctions on Iran, while the country would cut its uranium stockpile by 98 percent and limit its future nuclear capacities. The terms of the deal have come under fire from lawmakers in the U.S. and around the world who fear that the deal will not stop Iran from becoming a nuclear power or from becoming more aggressive toward Israel. The pact still needs to be approved by Congress before it passes into law.

More than one-half, 58 percent, of the people polled by Fox News Aug. 11-13 responded that if they were members of Congress, they would vote to reject the Iran nuclear agreement. Less than one-third, 31 percent, said they would vote to approve the deal, while one-tenth, 10 percent, said they did not know how they would vote.

GettyImages-483658374 U.S. Secretary of State John Kerry discusses the Iran nuclear agreement then being negotiated July 11, 2015. Kerry and President Barack Obama were instrumental in reaching the deal, which has faced great opposition. Photo: Getty Images

These poll numbers show bumps in the numbers of people who approve and disapprove of the Iran nuclear agreement, with a lower number saying they were uncertain of their opinion. A poll conducted by CBS July 29-Aug. 2 reported that only 33 percent of those polled were against the deal and that almost one-half, or 47 percent, did not know what they thought about the Iran deal.

The Fox News Poll also indicated that the vast majority of those surveyed, or 75 percent, believed that Iran would not honor the terms of the nuclear deal should it be approved by all parties. This number is actually the lowest in the past month by a margin of about 5 percentage points.

The Fox News Poll was carried out under the direction of Anderson Robbins Research and Shaw & Co. Research. The poll's sample was 1,008 registered voters. Results based on the full sample have a margin of sampling error of plus or minus 3 percentage points, according to the pollsters.