It was the second protest in as many days against the de facto Saudi ruler, who was expected to fly into Tunis from Egypt on Tuesday for talks with President Beji Caid Essebsi as part of a regional tour.
In his Sunday appearance on CNN, Schiff emphasized his concern about Trump's financial ties to the kingdom, and the possibility that these interests could play a role in the president's foreign policy. Bob Menendez are working on to sanction the Crown Prince.
"It's inconsistent with the intelligence I've seen", Lee said.
A frequent contributor to The Washington Post, Khashoggi went missing on October 2 after entering the Saudi consulate in Istanbul.
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Prince Mohammed visited Abu Dhabi Thursday as he began his first tour overseas since the murder of the Saudi journalist in October.
The New York-based rights group said it had filed a submission with Argentine prosecutors calling on them to invoke the country's universal jurisdiction statute to prosecute the crown prince for alleged war crimes committed by the Saudi-led coalition in Yemen.
A Turkish newspaper also reported on Thursday that CIA director Gina Haspel signalled to Turkish officials that the agency had a recording of a call in which the crown prince gave instructions to "silence" the journalist.
The UK has also been blasted for its continued arms sales to Saudi Arabia as it conducts its brutal war in Yemen. In 1985, an Israeli air raid on the headquarters of the Palestine Liberation Organization south of the capital killed more than 30 people, including Tunisian citizens.
Tarek Hussein, an Egyptian human rights lawyer residing in Tunis, said it meant a lot to him to see his country's flag raised in Tuesday's protest.
Other Republican senators, including Lindsey Graham, Rand Paul and Bob Corker, have been vocal about their belief of Saudi Arabia's Crown Prince's involvement in Khashoggi's killing.
The kingdom's public prosecutor is seeking the death penalty for five suspects charged in the murder, but has said Prince Mohammed had no prior knowledge of the operation.