Erdogan said his visit would “mark a historical turn of tide” and hailed “outstanding relations” between the nations.
Democrats have accused Trump of attempting to thwart the FBI’s probe into the US elections and have called for an independent inquiry into the matter.
The US’s federal hiring freeze will be lifted on Wednesday, but agencies will be asked to remain mindful of Trump’s goal to reduce the federal workforce.
Sean Spicer’s assertion sparked instant outrage on social media and from some Holocaust memorial groups who accused him of minimising Hitler’s crimes.
Trump’s order will help the programme for promoting historically black colleges and universities (HBCUs) facilitate partnerships with government agencies.
Reporters at the Associated Press and Time magazine walked out of the briefing when hearing that others had been barred from the session.
On President’s Day bomb threats were sent to 11 Jewish community centres, including ones in the Houston, Chicago and Milwaukee.
Washington and Tokyo have said that the weekend trip is a sign of the importance that both leaders place on the US-Japan relationship.
A raid on al Qaida branch of Arabian Peninsula in Yemen during the weekend was ill prepared and could have caused more civilian deaths, reports say.
Trump’s comments are likely to intensify tensions between the intelligence community and the president-elect.