The director, who refuses to refer to Donald Trump by his name, said "we just have to be smarter on who we vote."
Peter Naylor died of esophageal cancer in 2015, and now his wife is fighting to have the disease recognized as related to his service in Vietnam.
The actions of the U.S. government and the U.S. manufacturers of Agent Orange and other deadly herbicides is a moral outrage.
The rapper was joined by A Tribe Called Quest and Anderson .Paak onstage Sunday night.
Monsanto is expanding in a country it once helped destroy.