The US Democrats want to examine the financial relations of President Donald Trump to Saudi Arabia and Russia. The US government's foreign policy on Riyadh and Moscow would be influenced by Trump's "personal financial interests," said Adam Schiff, the future chairman of the House Intelligence Committee, on CNN television channel Sunday.

The Democrat MEP accused Trump of not telling the truth about the possible involvement of Saudi Arabian Crown Prince Mohammed bin Salman in the killing of journalist Jamal Khashoggi. He wanted to know if Trump was guided by a "financial motivation" in his course towards Riyadh, Schiff said.

"We do not know, but it would be irresponsible not to find out." The Congress must also pursue the suspicion that "the Russians have washed money on Trump's company".

Trump had also turned against evidence from his own intelligence service, according to which the government in Riyadh is behind the killing of Khashoggi in Saudi Arabia's Istanbul Consulate.

Republican Senator Mike Lee said on NBC television on Sunday: "The intelligence I've received indicates that the act was ordered by the Crown Prince." Trump, however, had stressed that the heir to the throne may have had "knowledge" of the deed. A confirmation for this, the foreign intelligence service CIA but not delivered.