Photos: Bernie Sanders

Democratic presidential candidate Bernie Sanders speaks at the Los Angeles Memorial Sports Arena on Monday night.

A Bernie Sanders supporter listen intently to his speech as Sanders addresses immigration reform during his campaign event, in Los Angeles on Monday night.

Supporters of presidential candidate Bernie Sanders raise their banners.

Presidential candidate Bernie Sanders speaks to a sold-out crowd.

Democratic presidential candidate Bernie Sanders speaks at the Los Angeles Memorial Sports Arena on Monday night.

Presidential candidate Bernie Sanders speaks to a crowd during a campaign event in Los Angeles on Monday night.

Presidential candidate Bernie Sanders speaks to a crowd during a campaign event in Los Angeles on Monday night.

Supporters rally for Democratic presidential candidate Bernie Sanders at the Los Angeles Memorial Sports Arena on Monday night.

Democratic presidential candidate Bernie Sanders speaks to the crowd at the Los Angeles Memorial Sports Arena on Monday night.

Supporters of Presidential candidate Bernie Sanders cheer as he addresses the crowd during his campaign event, in Los Angeles on Monday.

Supporters holds signs at the rally for Democratic presidential candidate Bernie Sanders.

A Bernie Sanders supporter leaps in the air as comedian Sarah Silverman makes an appearance.

Comedian Sarah Silverman introduces Democratic presidential candidate Bernie Sanders.