President Barack Obama changed his tune on Donald Trump, finally admitting that the New Yorker may be elected president.

“Anything is possible,” he told NBC’s Savannah Guthrie in an interview aired on Wednesday. “It is the nature of democracy, until those votes are casts and the American People, you know, have their say, we don’t know.”

Obama admitted that he had seen “all kinds of crazy stuff” happen in electoral politics and urged Democrats to be “running scared.”

“[Y]ou stay worried until all those votes are cast and counted,” Obama said. “Because one of the dangers in an election like this is that people don’t take the challenge seriously, they stay home, and we end up getting the unexpected.”

Obama added that he finds Trump “scary.”

“What I think is scary is a president who doesn’t know their stuff and doesn’t seem to have an interest in learning what they don’t know,” he said, laughing weakly.

Obama has changed his tune from earlier this year, when he repeatedly asserted that Trump would never be president.

“I continue to believe Mr. Trump will not be president, and the reason is because I have a lot of faith in the American people, and I think they recognize that being president is a serious job,” Obama said in February during a press conference.