Hillary Clinton may have gotten enough delegates to clinch the Democratic presidential nomination, but Bernie Sanders is remaining as an "active candidate for president."Even so, the candidates are working toward resolving several issues, Sanders' campaign manager Jeff Weaver insisted Friday."We are in discussions with the Clinton campaign," Weaver told MSNBC'sprogram. "That's been widely reported. The secretary and senator met in person a couple nights ago. I'm in communication with the Clinton campaign on a daily basis. So we are working towards coming to a resolution on a number of issues."Meanwhile, more than 12 million people have already voted for Sanders, said Weaver, and "need to have their voices heard."Weaver did not agree that it is time for Sanders to leave the race, and told the program that the Vermont Independent senator has been fighting for a progressive agenda for his whole life."I started working for him 30 years ago this month, and for him, this has always been about that," said Weaver. "I think he's articulated that on the stump now the entire year, and what he's trying to do is continue to make the changes we need so that the American government works for all people in this country and not just a few."And even if Sanders is not the nominee, Weaver said, the campaign is trying to make sure his supporters understand he will make sure their voices are heard."The change that they came out and voted for during the course of this campaign does not go away," said Weaver.Sanders' younger supporters will continue to fight for a progressive agenda, Weaver insisted."They are going to deal with some of the issues that young people are concerned about like the high cost of college education in a meaningful way," he said.