Senator Bernie Sanders addressed his nearly 1,900 delegates (and supporters who managed to make their way into the audience) on Monday before his speech at the opening night of the Democratic National Convention in Philadelphia.

Assuring his supporters that their revolution would continue, Sanders welcomed his delegates to Philadelphia, where they will represent the Vermont senator and the 13 million voters who voted for him in Democratic caucuses and primaries.

Sanders once again offered his success as proof that it is possible to run a campaign without super PACs, and said that the Democratic party platform, which he call the most progressive in the party’s history, is a sign of his campaign’s success.

A day after leaked emails revealed the DNC’s alleged preference for Hillary Clinton during the primaries, Sanders veered slightly from his usual stomp speech and mentioned the resignation of DNC Chair Debbie Washerman Schultz’ to great cheers from the crowd. Schultz’ resignation, Sanders said, means “opening the door to the party of those people who want real change.”

“How do we continue the political revolution?” he asked.

“We have got to be strong and consistent in making it clear that what we want to achieve is nothing less than the transformation of American society.”

As he’s been doing since he officially endorsed Hillary Clinton, Sanders said that to eventually achieve a better political future, the country must first defeat the imminent threat of Donald Trump.

“Immediately, right now, we have got to defeat Donald Trump and elect Hillary Clinton and Tim Kaine,” Sanders said, as his delegates began booing against the cheers of some.

“This is the real world that we live in,” Sanders continued, as he tried to get control of the crowd.

Photo: CNN. Video: Washington Free Beacon.