Former Vice President Al Gore visited with President-elect Donald Trump in New York City.

The discussion followed an earlier announcement that Gore would meet only with Trump’s daughter Ivanka, who has signaled interest in discussing climate change.

Gore described his visit with the Trumps as “lengthy and very productive.”

“It was a sincere search for areas of common ground,” he told reporters after leaving Trump Tower. “I found it an extremely interesting conversation, and to be continued, and I’m just going to leave it at that.”

Since his defeat in the 2000 election, Gore has traveled the globe predicting doom as a result of global warming.

He campaigned for Hillary Clinton in Florida during the presidential election, urging Democrats to vote for her despite a history of bad blood with the family.

“Her opponent, (Trump) based on the ideas he has presented, would take us toward a climate catastrophe,” Gore said in October.

It’s unclear what Trump discussed with Gore, especially since the president-elect is a climate change skeptic.

“The concept of global warming was created by and for the Chinese in order to make U.S. manufacturing non-competitive,” Trump wrote on Twitter in November 2012.

Earlier in the day, Trump spokesman Jason Miller indicated that Trump would not meet with Gore.

“The former Vice President will not be meeting with the President-elect,” Trump’s spokesman Jason Miller told reporters on a conference call on Monday morning.