Sen. Dick Durbin Richard (Dick) Joseph DurbinThe Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' Feinstein 'surprised and taken aback' by suggestion she's not up for Supreme Court fight Grand jury charges no officers in Breonna Taylor death MORE (D-Ill.) said Sunday that the U.S. should formally expel Saudi Arabia's ambassador in response to the killing of journalist Jamal Khashoggi.

"We ought to formally expel the Saudi ambassador from the United States until there is a completion of a third-party investigation into this kidnap, murder and god-knows-what-followed that occurred in Istanbul," Durbin said.

He suggested the ambassador be expelled "tomorrow morning," calling it part of a broader effort to send a message to Saudi leadership about Khashoggi's death. Unless countries like the U.S. take action, he said, "they’ll continue doing it."

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Durbin went on to argue that Saudi Crown Prince Mohammed bin Salman "has his fingerprints all over" Khashoggi's death, noting that several of the prince's personal bodyguards were among those detained in connection with the incident.

WATCH: Sen. Dick Durbin calls for Saudi ambassador to the United States to be expelled after Khashoggi killing. #MTP@DickDurbin: Saudi Crown Prince "has his fingerprints all over this" pic.twitter.com/UwWwTe4Rtk — Meet the Press (@MeetThePress) October 21, 2018

The senator's call to expel the ambassador comes a day after Republican Rep. Mike Coffman Michael (Mike) Howard CoffmanColorado mayor says he called protesters 'domestic terrorists' out of 'frustration' Colorado governor directs officials to reexamine death of Elijah McClain in police custody Petition demanding justice for Elijah McClain surpasses 2 million signatures MORE (Colo.) urged President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE to recall the acting U.S. ambassador from Saudi Arabia. There is not currently an individual appointed to that post, however.

Saudi officials announced Friday that Khashoggi was killed in a physical altercation gone awry at the consulate, and that 18 people had been detained in connection to the incident.

The explanation promptly drew skepticism from U.S. senators and Khashoggi’s former colleagues, who said the idea of the 59-year-old getting into a fight with Saudi security officials did not seem credible.

Trump called the explanation a “good first step,” but on Saturday acknowledged to The Washington Post that the Saudi comments about Khashoggi’s disappearance were constantly changing.

The president has walked a fine line following the journalist’s disappearance, at times vowing harsh punishment for those responsible and alternatively defending the importance of the economic relationship between the U.S. and Saudi Arabia.