James Clapper, the former director of national intelligence, said Sunday that Donald Trump s presidential campaign was not wiretapped under his watch.

For the part of the national security apparatus that I oversaw as [director of national intelligence], there was no such wiretap activity mounted against the president-elect, at the time, as a candidate or against his campaign. I cant speak for other Title III-authorized entities in the government, or a state or local entity, Clapper told NBC News Chuck Todd on Meet the Press.

Clapper added that he would have known if the FBI had obtained a warrant from the FISA court to eavesdrop on Trumps campaign over suspected illicit contact with Russian officials.

I can deny that the FBI obtained such a warrant, Clapper said.

Clapper was responding to Trumps claims on Saturday morning that then-President Barack Obama personally ordered the wiretapping of Trumps campaign headquarters in Trump Tower. Trump did not cite any evidence to support his claims.

Clapper also said Sunday that during the time he was director of national intelligence, the intelligence agencies did not possess any evidence that had any reflection of collusion between members of the Trump campaign and the Russians.

But the FBI or another agency could have obtained such evidence since Clappers departure at the end of the Obama administration in late January, he noted.

This could have unfolded or become available in the time since I left the government, Clapper said.