Sen. Angus King, I-Maine, speaks about immigration on Capitol Hill in Washington, Feb. 7, 2018.
Trump, who has maintained his support for Saudi Crown Prince Mohammed bin Salman despite calls from many United States politicians to impose sanctions on Riyadh over the killing of Washington Post columnist Jamal Khashoggi last month, has requested numerous times that Saudi Arabia keep oil prices lower.
Intelligence officials have said the CIA presented the President with a confidence-based assessment given the facts of the situation. "He's in total control".
"I hate the crime, I hate the coverup".
Saudi Arabia has warned criticism of the crown prince is a "red line".
Trump has been under mounting pressure from Democrats and Republicans in Congress for a tougher response over the killing.
Republican Senator Ben Sasse of Nebraska, a frequent Trump critic, said on Fox News, "Making the realist case (about the need for a U.S. -Saudi alliance) is a different thing than being so weak that we failed to tell the truth".
Also Sunday, King said he did not think it was "appropriate" to use US military troops at the southern border for law enforcement purposes regarding asylum seekers, but it was OK for troops to support customs and border patrol agents.
But even some of those who have sided with Trump in the past have begun to tire of his steadfast defense of Mohammed in the face of clear evidence of human rights abuses and U.S. intelligence's high-confidence assessment implicating the prince in Khashoggi's October killing. Trump announced last week that the USA would continue to back the kingdom, despite reported Central Intelligence Agency conclusions linking the crown prince to Khashoggi's demise.
Prince Salman's trip to the Argentine capital Buenos Aires will bring him face to face with world leaders for the first time since the killing of Washington Post journalist Khashoggi.
"The accepted position is that there is no way this happened without him being aware or involved", a USA official familiar with the CIA's conclusions told the Washington Post.
USA media have reported that the Central Intelligence Agency has concluded bin Salman was directly responsible for Khashoggi's death.
"The Saudi officials we are sanctioning were involved in the abhorrent killing of Jamal Khashoggi".
He said, "After the United States, Saudi Arabia is the largest oil producing nation in the world".
Prince Khalid said the center aims to provide the best health, scientific and research care, and achieve the aspirations of the government under the leadership of King Salman and Crown Prince Mohammed bin Salman.