Former Vice President Al GoreAlbert (Al) Arnold GoreImpeachment can't wait Lessons of the Kamala Harris campaign The Memo: Will impeachment hurt Democrats or Trump? MORE, who served under former President Bill ClintonWilliam (Bill) Jefferson ClintonImpeachment can't wait Turley: Democrats offering passion over proof in Trump impeachment The Hill's Morning Report - Dem dilemma on articles of impeachment MORE, is still not endorsing in the Democratic presidential race in which Hillary ClintonHillary Diane Rodham ClintonTrump to hold campaign rally in Michigan Saagar Enjeti ponders Hillary Clinton's 2020 plans Political ad spending set to explode in 2020 MORE holds a big lead over Bernie SandersBernie SandersTrump to hold campaign rally in Michigan Castro hits fundraising threshold for December debate Buttigieg draws fresh scrutiny, attacks in sprint to Iowa MORE
 
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"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 TrumpTrumps light 97th annual National Christmas Tree Trump to hold campaign rally in Michigan 'Don't mess with Mama': Pelosi's daughter tweets support following press conference comments 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.