He did not address charges that some of his closest security aides have been implicated in the October 2 death at the Saudi Consulate in Istanbul and made a particular plea that the incident would not cause a diplomatic break between Saudi Arabia and Turkey.
"They had a very bad original concept, it was carried out poorly, and the coverup was the worst in the history of coverups", he said in a 40-minute Oval Office appearance with Vice President Pence and lawmakers.
He added that whoever organised the plot "should be in big trouble".
Turkey has dismissed Saudi efforts to blame rogue operatives and urged the kingdom to search "top to bottom" for those responsible for the killing, which has stirred worldwide outrage and condemnation.
Gina Haspel testifies before the Senate Intelligence Committee on her nomination to be the next CIA director in the Hart Senate Office Building on Capitol Hill in Washington, DC, on May 9, 2018.
"The claim that has been made that Mr Khashoggi died in a fight does not amount to a credible explanation so there does remain an urgent need to establish what has happened in relation to this".
Khashoggi's death has piled more pressure on May's government to halt arms sales to Saudi Arabia, which has been waging a three-year bombing campaign in Yemen.
U.S. Secretary of State Mike Pompeo said the revocation of the visas "will not be the last word on this matter from the United States".
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Yet half a year on, Salah's fortunes are very different at Liverpool . "He was electric and exciting and scored goals ". The French side stays in third place with four points, and Red Star remain at the bottom with one point.
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After making it to the muddy banks of Mexico, she said, "No one checked my documents", as Consuelo headed to a taco restaurant. But as of this moment, I thank Mexico. "If that doesn't work out, we're calling up the military, not the National Guard".
Turkish President Recep Tayyip Erdogan on Tuesday laid out his country's initial findings in its investigation, saying Khashoggi's murder was "premeditated".
Over the past year, there have been several reports of clandestine meetings between Saudi and Israeli officials, including between the top statesmen: Netanyahu and Saudi Arabia's de-facto ruler Crown Prince Mohammed bin Salman.
Also on Thursday, Human Rights Watch said that Khashoggi's son, Salah, and his family have left Saudi Arabia for the United States after a travel ban on them was lifted.
He, however, acknowledged Turkey was still searching for answers to key questions, including who gave the order.
"The problem with stopping selling arms is that it doesn't have any effect on the ability of these countries to behave in the way that they want to because there are plenty of other sources of arms procurement", he told the BBC.
Karen Attiah, the global opinion editor at The Post, has been particularly vocal about the situation for Khashoggi's four children, three of whom, she said, have dual USA citizenship. And, you know, so many jobs.
The Trump administration and the US defense industry are scrambling to save the few actual deals in a much-touted $110 billion arms package for Saudi Arabia.
The ultimate number is around USD450 billion. "Yes, I think he did it", Sen. So we do that, we're just hurting ourselves. Most recently, Trump called Riyadh "a very good ally of ours", adding that it has "been helping us a lot with respect to Israel".