If Hillary Clinton is counting on an endorsement from her husband’s former vice president, she’ll have to wait for it.

Al Gore, who served two terms with former President Bill Clinton, politely but firmly declined when PEOPLE asked him if he supports Hillary Clinton for the 2016 Democratic presidential nomination.

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“It’s still too early, in my opinion, to endorse a candidate or pick a candidate,” Gore told PEOPLE in an interview to preview his 24-hour climate-change telethon, which starts on Friday.

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“Everybody can look at how the presidential campaign is developing and get some pretty clear ideas about how they think it’s going to turn out, but I still think it’s premature,” Gore said. “The election is still a full year away. I think I’ll wait to wade into it.”

RELATED: Meet all the 2016 Presidential CandidatesAs for reports earlier this year that some of his top loyalists were angling to get him into the 2016 race for the White House, the man who lost the brutally-fought – and contested – 2000 election to George W. Bush, chuckled at the idea of another round.