Turkish officials say they believe Khashoggi, a critic of Salman who has been living in self-imposed exile in the US, either was murdered October 2 inside the consulate when he went there to pick up documents to allow him to marry Cengiz, a Turkish national, or was spirited away to Riyadh.
US intelligence intercepted communications of Saudi officials discussing a plan to capture Khashoggi before he vanished, according to the Post, which cited two people familiar with the information.
However, they still have to be mindful of the need for Saudi cooperation on USA foreign policy goals, including Middle East peace, oil supplies, and missile defense system sales, analysts said.
"If there was any truth to the allegations of wrongdoing by the Saudi government it would be devastating to the US-Saudi relationship and there will be a heavy price to be paid - economically and otherwise", Graham wrote on Twitter.
"The US had no advance knowledge of Jamal Khashoggi's disappearance" or of any kind of threat, he said on Wednesday.
Crown Prince Salman said last week that Riyadh was "ready to welcome the Turkish government to go and search our premises", because it had "nothing to hide" about the missing journalist.
"It's a very serious situation for us and this White House", Trump said. The Post's source added it was unclear how the Saudi's planned on handling Khashoggi after receiving him or if the U.S. warned him that he was targeted.
Nour criticised Trump for his apparent willingness to ally with the "tyrannies" in the Middle East, a position he said damages the US's standing in the world.
Once Mr. Trump has determined "whether a foreign person is responsible for an extrajudicial killing, torture, or other gross violation of internationally recognized human rights against an individual exercising freedom of expression", according to the letter, he must report to the committee within 120 days with a decision on the imposition of retaliatory sanctions. I received an answer that further fuelled my fears: Jamal had already left, they told me, possibly without my noticing. Corker commented to CNN that he had "never heard of an embassy in my life that doesn't tape". "To me.it feels very much some nefarious activity has occurred by them". "But I don't want to rush to judgment".
Istanbul police experts were analysing vehicles which entered and left the consulate, some of which were then seen on camera on October 2 at the consul-general's residence, 200 metres away, the daily said. "As the President has conveyed, the United States is concerned by his disappearance".
The Saudi team is said to have arrived at Istanbul's Atatürk airport last Tuesday on two planes, one of which landed in the pre-dawn hours, and the second in the early afternoon.