Steven Mnuchin Mike Blake | Reuters

U.S. Treasury Secretary Steve Mnuchin is still planning to attend an upcoming summit in Saudi Arabia despite the controversy over the disappearance of Saudi journalist and political dissident Jamal Khashoggi, White House economic adviser Larry Kudlow said on ABC's "This Week." "Mr. Mnuchin will make up his mind as the week progresses and as new information surfaces," Kudlow said. His comments came shortly after Florida Senator Marco Rubio told CNN's "State of the Union" he believes Mnuchin should boycott the event. Rubio said the United States must confront Saudi Arabia or risk losing credibility on human rights, if allegations are proven true that the Saudi government orchestrated the killing of Khashoggi.

"If we do not take action, including potentially arms sales, as a result of this, if it turns out to be what they say it is, then we are not going to be able to with a straight face or any credibility confront Putin or Assad or Maduro in Venezuela or frankly confront the Chinese and their human rights violations," Rubio said on Sunday in an interview with CBS's Face the Nation. Khashoggi went missing after entering the Saudi consulate in Istanbul, Turkey, on Oct 2. to retrieve documents for his forthcoming marriage. Turkish officials and his fiancee said he never came out. Turkish sources have said they believe Khashoggi was killed inside the building and his body removed, allegations that Riyadh dismisses as baseless. U.S. President Donald Trump vowed to get to the bottom of what happened in a separate CBS interview, due to be aired Sunday, and said there would be "severe punishment" if it were found Khashoggi was killed by the Saudi government. But Trump also told reporters on Saturday that the United States must balance the economic benefit gained from an ongoing $110 billion arms deal with the Saudi military when planning a response.