The incoming chairman of the House Intelligence Committee, Adam Schiff, confirmed that the committee would investigate the case of the killing of Saudi journalist Jamal Khashoggi, and Trump's handling of the case.
In an interview with the Washington Post, Schiff said the intelligence committee would certainly seek all information on Khashoggi's death from US intelligence agencies.
Schiff added that the expected scrutiny by Congress would seek to expand in detail on the findings of the US intelligence and the rigidity of the basis on which it was based.
"Members of Congress have a feeling that Trump is deliberately misleading the conclusions of the US intelligence services to protect Saudi Crown Prince Mohammed bin Salman, and if so, how dare he do that?"
He said that would give Congress a clearer understanding of whether Trump misrepresented this conclusion in order to protect the Saudi crown prince.
A senior Democrat in the House of Representatives pledged to scrutinize the financial transactions between President Trump and the Saudis and how they affected his handling of the Khashoggi murder case.
Representative Schiff stressed that Democrats are determined to find out whether any foreign investment in Trump companies directs US policy in a way that may be considered unethical for Washington's interests.
The Democrat said the elected Congress should also consider broader questions about US-Saudi relations and Riyadh's behavior in other issues.
The incoming president of the intelligence committee has vowed to scrutinize the Yemen war, the stability of Saudi Arabia's ruling family and how the kingdom deals with dissidents and journalists.
Sheffe - the Democratic Party's biggest Democrat - is a candidate for president in January when his party takes control of the House of Representatives after gains in congressional elections held earlier this November.
Trump rejected the Central Intelligence Agency's assessment that Khashoggi's assassination had been ordered directly by the Saudi crown prince.
"The CIA has not reached a conclusion, they feel some things," he said, while the Saudi crown prince denied it "categorically."