Democratic presidential candidate Pete Buttigieg Pete ButtigiegBillionaire who donated to Trump in 2016 donates to Biden The Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November Buttigieg stands in as Pence for Harris's debate practice MORE slammed President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE on Monday for his quick exit from the United Nations's climate event.

The South Bend, Ind., mayor commented on a photo of the president's exit from the U.N. Climate Action Summit, saying it exemplifies the "end of American global leadership."

This is what the end of American global leadership looks like. pic.twitter.com/OmxrIDZYr9 — Pete Buttigieg (@PeteButtigieg) September 23, 2019

ADVERTISEMENT

Trump, a climate change skeptic, had previously said he was going to skip the summit entirely but made an unexpected appearance for 10 to 15 minutes.

The U.N. Climate Action Summit marks the central event during a week of international protests demanding action against climate change.

Buttigieg has previously pointed the finger at the president and his "enablers" in Congress for not doing enough to fight climate change. The 2020 hopeful released his own climate proposal earlier this month.