July 14, 2015 12:04 PM EDT

Former Secretary of State and 2016 presidential contender Hillary Clinton hailed the nuclear deal the U.S. and other world powers made with Iran on Tuesday after a meeting with Democrats in Congress.

Clinton told reporters at a news conference that the deal is a “very important moment” and that the deal is an “important step in putting a lid on Iran’s nuclear program.”

“There will be a number of issues that have to be addressed,” Clinton said. “It will need to be enforced vigorously, relentlessly.”

Earlier, Clinton gave a “vigorous” endorsement during a meeting with House Democrats, Politico reports.

Clinton said that if elected president she would be “absolutely devoted to ensuring that the agreement is followed.” Clinton also said Tuesday that the U.S. must continue working to address Iran’s “bad behavior” on issues including terrorism and the threat to Israel.

“We will have to immediately, upon completion of this agreement and its rigorous enforcement, look to see how we build a coalition to try to prevent and undermine Iran’s bad behaviors in other arenas,” Clinton said.

Clinton’s endorsement of the deal came after President Obama said it would be “irresponsible” for the U.S. to back away from the deal. He also threatened to veto any legislation in Congress to prevent its successful implementation. Republicans in Congress and Republicans running for president were quick to oppose the deal Tuesday.

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