Speakers include dNew Mexico Gov. Michelle Lujan Grisham, former Texas Congressman Beto O'Rourke, David Crosby, Montel Williams, Shannon Elisabeth, Fran Drescher, Lake Bell, Dave Schools and Lagangja Estranja.
The event started at 7 pm ET and costed from $35-$1,000.
Nelson's latest song, "Vote 'Em Out," is directed at President Trump, whose reelection he opposes.
So does John Fogerty, who has told the Trump campaign to stop playing his song "Fortunate Son" at rallies.