A majority of Americans believe the United States should remain part of the Iran nuclear deal, according to a new poll, which comes as President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE prepares to announce his decision on the Obama-era agreement.

In a new a poll published by CNN and conducted by SRSS, 63 percent said the United States should not withdraw from the agreement. That number is a slight dip from the 67 percent of respondents in October of 2017 who said the United States should not exit the deal.

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While 29 percent in the latest survey said the U.S. should exit, eight percent did not have an opinion.

Nearly half of those surveyed, 46 percent, said they disapprove of how the president is managing the nation’s relationship with Iran, while 37 percent said they approve. Seventeen percent said they did not have an opinion on the matter.

Results of the survey come as Trump on Tuesday will announce his decision about the Obama-era nuclear agreement, which provided Tehran with sanctions relief in exchange for curbs to its nuclear program.

Trump imposed a May 12 deadline to either improve the accord or for the United States to exit.

A majority of respondents, 75 percent, said Iran poses either a "very serious" or "moderately serious" threat to America. Fifteen percent said Iran is only a "slight" threat, while seven percent said the country is not a threat to the U.S.

The poll of 1,015 individuals was conducted by phone from May 2-5. It has a margin of error of plus or minus 3.6 percentage points.