Sen. Lindsey Graham urged President Donald Trump to go "all-in" for Israel in its conflict with Iran, while other lawmakers prefer a diplomatic end to the conflict to prevent further escalation.

The sixth round of U.S.-Iran nuclear talks will be held on Sunday in Muscat, the Omani foreign minister said on Thursday, after U.S. President Donald Trump reiterated that Tehran would not be allowed to have a nuclear weapon.

Iran has warned it will ramp up its nuclear activities after the United Nations nuclear watchdog’s 35-member board of governors adopted a resolution Thursday declaring it in breach of its non-proliferation obligations.

The IAEA is expected to vote on a draft resolution stating that Iran has not provided answers and is violating commitments regarding the nuclear agreement.

President Donald Trump warned in a recent interview that he is "less confident" that the United States will reach a nuclear deal with Iran.