U.S. President Donald Trump has said that, during their recent conversation, the Saudi king firmly denied allegations that he or his crown prince had any knowledge of or role in the disappearance of Khashoggi, who was last seen entering the Saudi consulate in Istanbul.
Khashoggi hasn't been seen since entering the Saudi consulate in Istanbul more than two weeks ago.
In Istanbul, a leaked surveillance photo showed a man who has been a member of the crown prince's entourage during trips overseas walking into the Saudi Consulate just before Khashoggi vanished there - timing that drew the kingdom's heir-apparent closer to the columnist's apparent demise.
Using oil as a weapon would hurt Saudi Arabia more than it would hurt the USA, she says. I mean, it's bad, bad stuff. Turkish police have claimed they have evidence the journalist was murdered inside the building.
Danny Toma, a retired US foreign service officer, tells OneNewsNow the United States must tread carefully before directing accusing bin Salman.
Officials from some of Saudi Arabia's leading Western allies joined a slew of corporate bigwigs who are now shunning next week's gathering, touted as a high-powered showcase for the economic reforms of Crown Prince Mohammed bin Salman.
"Our foreign policy", he says, "has to serve our interest, which is to say the safety, security, and wellbeing of Americans".
Turkish authorities have told reporters that Khashoggi was murdered in the consulate by a state-sponsored hit squad, and other media outlets have reported subsequently that members of the team sent to Turkey had close ties to Saudi government.
Turkish police believe Mr Khashoggi's killers may have dumped his remains in Belgrad Forest, next to Istanbul, and near the rural city of Yalova, 90 kilometres (55 miles) away from the Turkish capital, senior officials have said.
Saudi officials have vehemently denied any involvement in Khashoggi's disappearance and say that he left the consulate soon after arriving.
"The Saudis have been playing coy with this, trying to come up with cover stories to explain what was going on", Lendman said.
President Donald Trump is facing increased pressure from Congress over his handling of Khashoggi's disappearance, exposing a widening rift between the White House and Capitol Hill over the US relationship with Saudi Arabia.