"At least five high-profile Democrats running for president will not be attending a town hall airing on MSNBC this week focused on climate change — an issue many in the 2020 field count among the most urgent facing the United States and the world.
The campaigns of Joe Biden, Elizabeth Warren, Kamala Harris and Beto O'Rourke told organizers the candidates will not attend the forum in Washington, according to Kelly Ogburn, spokeswoman for Georgetown University's Institute of Politics and Public Service, which is one of the event's hosts.
Staffers for a fifth candidate, Amy Klobuchar, told organizers they would check the senator's schedule but never got back to the university, Ogburn said."
Dino Grandoni reports for the Washington Post September 16, 2019.