Trump will depart on his first foreign trip as US president later today
Donald Trump has insisted there was no collusion between himself and Russia.
The US president spoke to the media for the first time since a series of controversies enveloped the White House earlier this week.
In a news conference with President Juan Manuel Santos of Colombia, Trump was asked if he ever asked the then FBI director James Comey to drop the investigation into former national security adviser Michael Flynn.
He simply responded: "No. No. Next question."
Mr Trump said he respected the decision to appoint a special counsel, but added: "The entire thing has been a witch hunt.
"There's been no collusion between certainly myself and my campaign, but I can always speak for myself, and the Russians. Zero. I think it divides the country."
He stressed that he wanted to get back on track with his policy initiatives.
The comments came after a dramatic few days in Washington.
On Monday, it was claimed that President Trump had disclosed 'highly classified information' to Russian officials during a meeting in the Oval Office.
Barely 24 hours later, The New York Times reported that President Trump urged the then FBI director James Comey to end an investigation into former national security adviser Michael Flynn.
Mr Comey was fired by President Trump last week, with the US president having since admitted the 'Russia thing' was on his mind when he made the decision.
On Wednesday, the US justice department - facing mounting pressure from Democrats and even some Republicans - appointed another former FBI director as special counsel to oversee the investigation into alleged links between the Trump campaign and Russia.
Mr Trump is leaving Washington today for his first foreign trip as president.
He will travel to Saudi Arabia before moving on to Israel, Italy, and the Vatican. He will end the international tour by attending a NATO Summit in Brussels and the G7 in Sicily.