Senator Bob Menendez said he was "disappointed, but not surprised, that the Trump administration has failed once again to prioritize our long-term national security interests or stand up for human rights."
Senator Chris Murphy told Newsweek that "the intelligence does not say Iran is taking action unilaterally without regard to previous American decisions."
U.K. Foreign Minister Jeremy Hunt told reporters that "we are very worried about the risk of a conflict happening by accident, with an escalation that is unintended, really on either side."
President Donald Trump was set to leave the Arms Trade Treaty, but the U.S. has reportedly acted above international law for years in murky weapons sales around the world.
Russia has expanded its reach in Africa with a new nuclear deal in Ethiopia and sought further plans with Egypt and Saudi Arabia.
Turkey said its purchase of the S-400 defense system was "a done deal" as China and India also signed purchase agreements. Saudi Arabia and Qatar were among those looking to buy it as well.
A letter from the House oversight committee's chairman alleges that Trump administration staff used personal email to discuss transferring sensitive nuclear technology to the Saudis.
"Support impeachment!" the Californian Democrat tweeted.
Arab states are rehabilitating their ties with Syrian President Bashar al-Assad, but the United States is trying to stop them, pressuring allies like Saudi Arabia to stand against him.
The drills were designed "to protect the territorial waters of our country, maintain lines of communication and promote the flag of the Islamic Republic of Iran."
President Donald Trump ignored a deadline to provide more answers on the Saudi crown prince's alleged role in the killing of Jamal Khashoggi. Now senators are coming after him.
Riyadh denies the crown prince played any role in the killing of the journalist.
Trump's uncritical support for autocrats relies on the U.S. remaining the sole superpower in the region. But both their regime and America's global standing are more fragile than they appear.
Washington has sanctioned 17 Saudi officials for their alleged role in the killing of journalist Jamal Khashoggi.
Moscow believes the 33-year-old prince should succeed his father as king of Saudi Arabia.
The president offered his "Thanks to Saudi A!" for agreeing to rebuild Syria, but the details of the arrangement were not made clear.
Senators have for the first time used the powers afforded to them by the 1973 War Powers Resolution to block U.S. support for Saudi Arabia.
The president's staunch support of Saudi Arabia was undermined by his own U.N. ambassador.
Assad accepted the credentials of newly appointed ambassadors Tigran Gevorgyan of Armenia and José Gregorio Biomorgi Muzattiz of Venezuela.
Saudi Arabia reportedly singled out Jared Kushner, adviser and son-in-law of President Donald Trump, as part of a campaign to establish influence in the White House.
Senator John Kennedy said, "Prince Mohammed gave the order, or at least he knew about it, to butcher [Jamal] Khashoggi."