The vote paves the way for sanctions to begin being lifted in 90 days.
60 top former foreign policy officials warned Congress not to reject it.
The 2016 hopeful slammed Obama's moves on Iran and Cuba, calling it "capitulation Monday."
Today's meeting between Obama and Muhammadu Buhari is an opportunity for a reset.
Nine airstrikes were carried out in Syria while 16 were conducted in Iraq.
"Iran is a terror-sponsoring, anti-American, outlaw regime,” Sen. Tom Cotton said.
“It’s so much better than the alternative,” David Cameron added.
“I think it was an absolute mistake," Sen. John Barrasso said.
"It will accelerate the nuclear arms race,” he said.
“If Congress doesn’t pass this, we have no sanctions,” he said.
Republicans say the Obama administration is about to leapfrog Congress.
Rejecting the pact "would be devastating to our standing in the world," Josh Earnest said.
A protestor drenched himself in red paint to symbolize the blood of Cubans.
The U.S. and Cuba restored full diplomatic relations on Monday.
The council's 15 members were unanimous.
Cuba's flag is set to fly outside of its embassy in Washington for the first time since 1961.
“We’re reaching an agreement with a homicidal maniac," the former New York mayor said.
The senator said the deal was made possible by changes in Iran's leadership.
“This deal paves Iran’s path to a nuclear arsenal,” he said.
Dems don't want to oppose Obama but are wary of the deal.
"We feel very confident that we would find evidence of nuclear activity," Moniz said.
Israel is engaging in a major lobbying push against the nuclear deal.
It's his first Persian Gulf meeting since the nuclear deal was announced.
Concerns about Islamic extremism have grown rapidly in recent years.