A recent survey found that 76% of Americans believe the ongoing U.S.-Iran war has proven more challenging than the Trump administration expected, CBS News reported Sunday.
The survey was conducted by CBS News and YouGov between July 22 and 24.
According to the survey, 58% of respondents said they felt uncertain about the ongoing conflict, while 57% reported feeling frustrated.
Another 36% expressed pessimism, while only 19% said they felt optimistic.
The survey also found that 20% of respondents believed the war had unfolded as expected, while 4% said it had proven easier than expected.
Asked about the balance of the conflict, 40% of respondents said the United States was in the more advantageous position.
Another 38% said neither side held an advantage, while 22% said Iran was in the stronger position.
U.S. President Donald Trump said Monday that Washington remains engaged in "deep talks" with Tehran but is also preparing to restart military operations if negotiations stall.
"If they don't work out, we will go back to very strong military action," Trump told Israeli broadcaster Channel 12.
He said the diplomatic window was narrow, adding that the process must move forward rapidly "or not at all."
Trump said he paused strikes Friday after appeals from regional mediators.
"All of the people that deal with Iran asked me: 'Don't fire,'" Trump said, adding that there was "nothing gained, nothing lost by granting the request."
His remarks came ahead of his scheduled meeting Tuesday with Israeli Prime Minister Benjamin Netanyahu.
The United States and Israel launched strikes on Iran in late February, citing threats and concerns over Tehran's nuclear program.
Pakistan mediated a cease-fire in April, and Tehran and Washington later signed a memorandum of understanding in June to allow for further negotiations and end the war permanently.
But tensions flared earlier this month over disagreements on navigation in the Strait of Hormuz, which Iran effectively blocked during the conflict.