Senator Bernie Sanders addressed a more left-leaning audience at Coachella on Saturday, while President Trump thrilled crowds in Miami. At the event, the socialist firebrand took the stage to discuss his pet causes.

The independent Vermont senator was the surprise opening act for singer-songwriter Clairo, who Sanders thanked for “allowing him” to speak to the captive audience ahead of her much-anticipated performance — a speech he used to rail against the 1%, President Trump, and the war in Gaza.

“This country faces some very difficult challenges and the future of what happens to America is dependent on your generation,” Sanders said at the opening of his remarks to the crowd of partygoers at the event in Indio, Calif.

“We need you to stand up to fight for justice. To fight for economic justice. Social justice. And racial justice,” the Vermont senator pontificated to an enthusiastic crowd.

While Trump got a thunderous reaction from the crowd in Miami at the UFC 314 event, his name didn’t get a warm welcome when Sanders referenced him before the music fans in blue California.

“Now we got a president of the United States,” Sanders started before being interrupted by a loud chorus of boos, to which he replied, “I agree.”

“He thinks that climate change is a hoax. He is dangerously wrong. And you and I are going to have to stand up to the fossil fuel industry and tell them to stop destroying this planet,” Sanders raged with the approval of Coachella revelers.

Sanders also harped on issues such as women’s rights, raged against the “billionaire class,” and harped on the inadequacies of the American healthcare industry.

“We need you to stand up to insurance companies and the drug companies and understand that healthcare is a human right,” Sanders roused.

The 83-year-old revealed in the speech that he is a major fan of Gen-Z musician Clairo, who he characterized as a proper liberal advocate.

“I’m here because Clairo has used her prominence to fight for women’s rights, to try and end the terrible brutal war in Gaza, where thousands of women and children are being killed. So I want to thank Clairo for not only being a great band, but for the great work she is doing,” Sanders said before introducing the musical set.

Sanders is currently on a speaking tour entitled “Fighting Oligarchy: Where We Go from Here,” which drew the senator massive crowds in Tempe, AZ., Denver, CO., and Los Angeles, Calif., in the last three days.