Trump insists 'nobody really knows' who meddled in election, points the finger again at Obama President Trump held a press conference overseas with the Polish president.

 -- President Trump on Thursday appeared to cast doubt again on the U.S. intelligence community's conclusion that Russia interfered in the 2016 presidential election, saying before a major speech in Poland that there could have been others involved and that "nobody really knows for sure."

"I think it was Russia, but I think it was probably other people and/or countries, and I see nothing wrong with that statement. Nobody really knows. Nobody really knows for sure," Trump said in his first press conference overseas as president.

He also again placed blame on his predecessor Barack Obama for not taking stronger action to confront Russia for interfering in the election, accusing him of not taking action because "he thought [Hillary] Clinton was going to win the election."

"He did nothing about it. Why did he do nothing about it? He was told it was Russia by the CIA, as I understand it. It was well reported. He did nothing about it. They say he choked. I don't think he choked. I think what happens is he thought Hillary Clinton was going to win the election and said, 'Let's not do anything about it.' Had he thought the other way, he would have done something about it," Trump said.

He added, "If he thought I was going to win, he would have done plenty about it."

Trump has recently turned his focus to blaming Obama for not taking action to confront Russia, after months of questioning its role in the election and decrying the Russia story as "fake news."

As recently as December, Trump openly entertained the concept that it could have been "somebody sitting in a bed someplace" who hacked Democratic National Committee computers before the election.

"They have no idea if it's Russia or China or somebody. It could be somebody sitting in a bed someplace. I mean, they have no idea," he said.