A Republican Senator in the Senate Foreign Relations Committee has made clear that American legislators are considering imposing further sanctions on Iran, despite the agreement world powers signed with the Islamic Republic on Tuesday.
"All options are on the table," the Senator told news site The Hill, including placing new economic sanctions on Iran.
US President Barack Obama, however, has threatened recently to "veto any legislation" passed by Congress blocking the deal.
During a press conference on Wednesday about the final deal, Obama said Congress could discuss the agreement.
"I expect the debate to be robust, and that's how it should be; it's an important issue," he added. "Our national-security policies are stronger and more effective when subject to the scrutiny and transparency that democracy demands."
In spite of his willingness to allow Congress to debate the agreement, Obama asserted it would be "irresponsible" to object to the deal and maintained he would veto any attempts to torpedo it.
Meanwhile, the United States petitioned the United Nations Security Council late Wednesday to adopt the deal on Iran's nuclear program.
According to the draft resolution circulated, Reuters reported, the 15-member council would endorse the agreement but retain an arms embargo and ban on ballistic missile technology.
US Ambassador to the UN Samantha Power privately briefed the Security Council on the resolution, which will go up for a vote sometime next week.