article_snippet: The conflict between the administration and mainly Republicans in Congress has emerged as among the tensest subplots to the diplomatic effort.
article_snippet: Because U.S. lawmakers can block the lifting of some penalties against Iran and potentially pass additional trade or financial restrictions, U.S. lawmakers hold the power to undermine an accord.
article_snippet: U.S. lawmakers are pressing for at least a say in whether any deal U.S. U.S. and U.S. partners reach is acceptable.
article_snippet: Negotiators are talking about freezing Iran's uranium and plutonium programs for at least a decade in exchange for a gradual easing of economic pressure on the Iranians.
article_snippet: Many in Congress say U.S. U.S. should hold out for greater dismantlement of Iran's nuclear infrastructure.
article_snippet: But opponents of a deal have been vague about what types of continued nuclear activity - if any - they would deem acceptable. '
article_snippet: In previous years when U.S. policy was not to talk to Iran and insist at the same time that they can have no nuclear program, whatsoever, the number of centrifuges skyrocketed.
article_snippet: Every time negotiations have broken down in the past, Iran's nuclear program has advanced.'
article_snippet: Negotiators are talking about freezing Iran's uranium and plutonium programs for at least a decade in exchange for a gradual easing of economic pressure on the Iranians .
article_snippet: But negotiators need an agreement that translates that commitment into an agreement that can 'guarantee that Iran's program will be peaceful now and peaceful forever'. '
article_snippet: It may be that Iran simply can't say yes to the type of deal that the international community is looking for, but owe the international community to the future of everybody in the world to try to find out.'
article_snippet: Iranian Foreign Minister Mohammad Javad Zarif said at the conference that negotiations with Iran can not stop, because 'every time negotiations have broken down in the past, Iran's nuclear program has advanced'
article_snippet: Obama's relationship with Prime Minister Benjamin Netanyahu reached a new low earlier this month when Prime Minister Benjamin Netanyahu sharply criticized American policy on Iran in an address before the U.S. Congress.