Bernie Sanders campaign rally in Vista

After speaking at a rally at the Rancho Buena Vista High School football stadium, Democratic presidential candidate Bernie Sanders waves to members of Rancho Buena Vista’s marching band, called Rhythm of the Ranch, after he posed for a picture with them  (Hayne Palmour IV / San Diego Union-Tribune)

After speaking at the Rancho Buena Vista High School football stadium, Democratic presidential candidate Bernie Sanders shakes hands with members of Rancho Buena Vista’s marching band after he posed for a picture with them.  (Hayne Palmour IV / San Diego Union-Tribune)

Thousands of people line up along Longhorn Drive as the wait to see Democratic presidential candidate Bernie Sanders speak at Rancho Buena Vista High School in Vista.  (Hayne Palmour IV / San Diego Union-Tribune)

As the stage is prepared in the background, people stand in line as the wait to see Democratic presidential candidate Bernie Sanders.  (Hayne Palmour IV / San Diego Union-Tribune)

Ten-year-old Jack Rasor, who had been waiting since 8 a.m., lies in the gutter and he and others stand in line to see Democratic presidential candidate Bernie Sanders.  (Hayne Palmour IV / San Diego Union-Tribune)

Bernie delegates Paula Marvin, left, and Lorraine Salas, both teachers from Coachella Valley, carry a sign as they walk in line with other people to see Democratic presidential candidate Bernie Sanders.  (Hayne Palmour IV / San Diego Union-Tribune)

People in line to see Democratic presidential candidate Bernie Sanders, walk along Longhorn Drive.  (Hayne Palmour IV / San Diego Union-Tribune)

Bernie Sanders supporter Clay Mitchell sings his song called “Enough is Enough” as he and other people wait in line to see Democratic presidential candidate Bernie Sanders.  (Hayne Palmour IV / San Diego Union-Tribune)

Steve Jones sells Bernie Sanders shirts to people in line to see Democratic presidential candidate Bernie Sanders.  (Hayne Palmour IV / San Diego Union-Tribune)

True Deloranzo holds a painting he did of Democratic presidential candidate Bernie Sanders as he and others wait to see Sanders.  (Hayne Palmour IV / San Diego Union-Tribune)

Robin Hampton and Jim Drogo, both from Fallbrook, sit on artificial turf as they and others wait to see Democratic presidential candidate Bernie Sanders.  (Hayne Palmour IV / San Diego Union-Tribune)

Michael McGarity and other members of the Rhythm of the Ranch Marching Band perform.  (Hayne Palmour IV / San Diego Union-Tribune)

Bernie Sanders supporters cheer just before Democratic presidential candidate Bernie Sanders arrives.  (Hayne Palmour IV / San Diego Union-Tribune)

Bernie Sanders supporters wave their arms to music played over the PA system just before Democratic presidential candidate Bernie Sanders arrives.  (Hayne Palmour IV / San Diego Union-Tribune)

Democratic presidential candidate Bernie Sanders arrives at Rancho Buena Vista High School.  (Hayne Palmour IV / San Diego Union-Tribune)

Bernie Sanders supporters cheer after Democratic presidential candidate Bernie Sanders arrives at Rancho Buena Vista High School.  (Hayne Palmour IV / San Diego Union-Tribune)

Democratic presidential candidate Bernie Sanders holds up a fist to a cheering crowd after walking up to the podium at Rancho Buena Vista High School in Vista.  (Hayne Palmour IV / San Diego Union-Tribune)

Democratic presidential candidate Bernie Sanders speaks at Rancho Buena Vista High School in Vista.  (Hayne Palmour IV / San Diego Union-Tribune)

Bernie Sanders supporters cheer as Democratic presidential candidate Bernie Sanders speaks.  (Hayne Palmour IV / San Diego Union-Tribune)

Democratic presidential candidate Bernie Sanders speaks at Rancho Buena Vista High School in Vista.  (Hayne Palmour IV / San Diego Union-Tribune)

Democratic presidential candidate Bernie Sanders speaks at Rancho Buena Vista High School in Vista.  (Hayne Palmour IV / San Diego Union-Tribune)

Democratic presidential candidate Bernie Sanders speaks at Rancho Buena Vista High School in Vista.  (Hayne Palmour IV / San Diego Union-Tribune)

Democratic presidential candidate Bernie Sanders speaks at Rancho Buena Vista High School in Vista.  (Hayne Palmour IV / San Diego Union-Tribune)

Bernie Sanders supporters listen as Democratic presidential candidate Bernie Sanders speaks.  (Hayne Palmour IV / San Diego Union-Tribune)

A couple listen to Democratic presidential candidate Bernie Sanders speak.  (Hayne Palmour IV / San Diego Union-Tribune)

Democratic presidential candidate Bernie Sanders puts on a RBV cap as he speaks at Rancho Buena Vista High School.  (Hayne Palmour IV / San Diego Union-Tribune)

Democratic presidential candidate Bernie Sanders speaks at Rancho Buena Vista High School in Vista.  (Hayne Palmour IV / San Diego Union-Tribune)

A Sanders supporters cheers as Democratic presidential candidate Bernie Sanders speaks.  (Hayne Palmour IV / San Diego Union-Tribune)

Democratic presidential candidate Bernie Sanders waves to the crowd at the conclusion of his speech.  (Hayne Palmour IV / San Diego Union-Tribune)

Supporters of Democratic presidential candidate Bernie Sanders reach out to shake his hand after Sanders spoke.  (Hayne Palmour IV / San Diego Union-Tribune)

Democratic presidential candidate Bernie Sanders shakes hands with supporters after speaking at Rancho Buena Vista High School in Vista.  (Hayne Palmour IV / San Diego Union-Tribune)

Democratic presidential candidate Bernie Sanders shakes hands with supporters after speaking at Rancho Buena Vista High School in Vista.  (Hayne Palmour IV / San Diego Union-Tribune)