Former Vice President Al GoreAlbert (Al) Arnold Gore2020 general election debates announced Odds place Greta Thunberg as front-runner for this year's Nobel Peace Prize Joe Lieberman's son running for Senate in Georgia MORE, who served under former President Bill ClintonWilliam (Bill) Jefferson ClintonWhy calls for impeachment have become commonplace Meet Trump's most trusted pollsters A way around our impeachment debacle: Bob Dole's 'censure' solution MORE, is still not endorsing in the Democratic presidential race in which Hillary ClintonHillary Diane Rodham ClintonRonan Farrow exposes how the media protect the powerful Kamala Harris to Trump Jr.: 'You wouldn't know a joke if one raised you' Comey says he has a 'fantasy' about deleting his Twitter account after end of Trump term MORE holds a big lead over Bernie SandersBernie SandersSanders on difference with Warren: she's a capitalist 'I'm not' Sunday Show Preview: Trump's allies and administration defend decision on Syria Klobuchar takes shots at health and education plans supported by Sanders and Warren MORE
"I've gotten signals that you could easily interpret that way," Gore responded when asked during an interview aired Monday on NBC's "Today" show whether either Democrat had sought his endorsement.
NBC reported Monday that Gore said in their interview that he "will back the Democratic nominee."

Gore also indicated in the NBC interview that he's been surprised by the tone of the 2016 race.

"I'm one of millions who, sometimes, just, I do a double take: 'Whoa, what was that?'" Gore said. "It's been unusual."

Gore argued presumptive GOP nominee Donald TrumpDonald John TrumpGiuliani says he is unaware of reported federal investigation Louisiana's Democratic governor forced into runoff Lawmakers focus their ire on NBA, not China MORE "has said some things on the climate crisis that I think should concern everyone."

But he left open the possibility that there could be some "hope" with Trump.

"I'm not Pollyannaish about it, but I do think that there is still some basis for hope," Gore insisted.

"President [Jimmy] Carter said that he hopes he'll be malleable," Gore said, adding with a laugh, "I don't know." 

Gore was pressed several times last year on endorsing in the Democratic race. He said in November it was "still too early" to endorse, telling People magazine, "The election is still a full year away. I think I'll wait to wade into it."

An aide later told Politico that the former vice president had "no plans to endorse" in the primary.