In making that determination, the senators hope Trump "will consider any relevant information, including with respect to the highest ranking officials in the Government of Saudi Arabia".
Corker said that he had warned the kingdom that its political support in the Senate is "the lowest ever" and that if Saudi officials are responsible for Kashoggi's disappearance, "this would drop it off a cliff".
"We can not let this happen - to reporters, to anybody", he added during the Oval Office meeting with the Secretary of Homeland Security and Federal Emergency Management Agency administrator.
Khashoggi, a Washington Post contributor who has written columns critical of Saudi Crown Prince Mohammed bin Salman, disappeared on October 2 and was last seen entering the Saudi consulate in Istanbul where he went to pick up a document he needed for his planned marriage.
A Turkish official told Reuters last week that authorities believed Khashoggi had been killed in a "premeditated" murder and his body moved out of the consulate, but details have been slow to emerge and Turkish officials have not said how they reached such conclusions.
The kingdom has called the allegations "baseless", but has not provided any evidence that Khashoggi left the consulate and did not respond to requests for comment. It was not clear whether the Saudis meant to arrest and interrogate Khashoggi or to kill him, or if the United States warned Khashoggi that he was a target, this person said.
The documentation indicates Khashoggi was set to lead DAWN, and that it aimed to gather "Arab Spring exiles who are scattered in various world capitals and cities, to strengthen their morale and utilise them". A day earlier, the state department called for Saudi Arabia to conduct a thorough probe into the case.
"If it turns out that suspicions of Saudi involvement in the murder of this journalist are true", Kaine said, "it could be a real sea-change in the relationship between the USA and Saudi Arabia that could affect many things, including US support for what Saudi Arabia is doing in Yemen". He's got a vision for the country that I think is extraordinary for a young leader.
Turkish media, which released surveillance camera video of the men on Wednesday, said they were members of an elite Saudi "assassination squad", sent to kill Khashoggi, a Saudi critic.
Khashoggi has written articles in The Washington Post that were critical of the Saudi regime and its intervention in the war in Yemen.
Turkish newspaper Sabah, without saying how it obtained the information, reported that on the day Khashoggi went missing, two jets arrived from Riyadh to Istanbul carrying 15 passengers, then returned home later that day via Egypt and Dubai.
Groups of men thought to be Saudi are seen entering Turkey via Istanbul airport, checking in at hotels and later leaving the country.
News channel 24 aired the video, suggesting that Mr Khashoggi was inside of the black Mercedes Vito, which resembled one parked outside of the consulate when the writer walked in on 2 October. The 15 Saudis left Turkey at four different times, the Sabah report said.
Sen. Lindsey Graham (R-SC) declared that there will be "hell to pay" if Saudi Arabia is behind the murder of Jamal Khashoggi, dissident and Washington Post contributor. "Silence, denials and delays are not acceptable", Ryan wrote in a statement.
"We knew of Jamal's interest in building platforms to promote the discussion of issues that he is passionate about, notably freedom and democracy in the Middle East", he told the Daily Beast.