Former Democratic presidential nominee Al Gore won’t be attending the Democratic national convention, but he went on Twitter to say that he’ll vote for Hillary Clinton in November.
Gore, who served as vice president under Bill Clinton, spoke at the 2004 and 2008 conventions but skipped the 2012 gathering. In November, he told PEOPLE that it was “still too early” to endorse a candidate.
In a series of tweets Monday, Gore backed Clinton in part because of her position on climate change, a major issue for him.
I am not able to attend this year’s Democratic convention, but I will be voting for Hillary Clinton. (1/3)
— Al Gore (@algore) July 25, 2016
Given her qualifications and experience — and given the significant challenges facing our nation and the world, (2/3)
— Al Gore (@algore) July 25, 2016
including, especially, the global climate crisis, I encourage everyone else to do the same. (3/3)
— Al Gore (@algore) July 25, 2016
A spokeswoman for Gore, who is a superdelegate for his home state, told the Nashville Tennessean that he would not be attending due to unspecified “obligations in Tennessee.” An aide had also previously told Politico that Gore would endorse after the Democratic Party chose a nominee. Clinton effectively clinched the nomination in early June.
This article originally appeared on Time.com.