The United States said on Tuesday it will make sure the International Atomic Energy Agency (IAEA) is adequately funded to report on Iran's past, present and future nuclear programmes at ease.
The IAEA is a UN nuclear watchdog responsible for monitoring Iran’s nuclear activities, the agency asked its member states to step up financial contributions for that mission.
After Tehran reached a historic nuclear deal with world powers in July, its atomic programme will be curbed to exclude all weaponised use or research in return for immediate sanctions relief which will push the country’s economy into financial prosperity.
"The United States is committed to working with all [IAEA] member states to ensure the agency has the resources it needs to verify Iran's nuclear-related commitments under the [July 14 agreement]," the US mission in Vienna said in a statement.
US President Barack Obama has won the backing of a fresh clutch of senators the newly approved nuclear deal with Iran on Tuesday, raising the probability of him dodging a legislative rebuke.
Several Republicans and some Democrats have looked on course to pass a resolution against the nuclear deal for months, which comes as a vocal contradiction to Obama’s foreign policy goal. Republicans need the support of a total of six Senate Democrats to pass a resolution against the deal.
With 15 Senate Democrats backing the deal so far, including Senate minority leader Harry Reid and Michigan's Debbie Stabenow, the deal may eventually pass and Obama will successfully dodge the rejection probabilities.
"Our goal all along has been to build as much support in Congress as we possibly can," said spokesman Josh Earnest on Monday.
"What we have been focused on is building the kind of support that we need in both the House [of Representatives] and the Senate to sustain a presidential veto."
However a "no" vote next month would not be enough to scrap the deal, as a result of Obama's veto power. A "no" can empower the next president to upend the deal and signal problems in lifting Congressionally mandated sanctions on Iran, which is a crucial part of the agreement.
With just two Democrats publicly opposed to the deal -- and six others of undeclared stance -- the vote in the Senate looks in favour of the deal.
Those in favour of the deal are reportedly lobbying fiercely to avoid the veto, with campaign donors threatening to withhold future funding.
"A majority in the House for the resolution of disapproval is probably certain," said Corey Boles, a senior analyst with the Eurasia Group.
"It is an open question whether opponents of the deal will be able to muster the necessary 60 votes in the Senate to advance the measure."
So far New York's Chuck Schumer and New Jersey's Bob Menendez joined the anti-deal camp while 28 Democrats have declared their support for the deal.
Obama needs 34 Senate votes in favour of the deal to uphold his veto in case a resolution of disapproval passes .