Bernie Sanders showed he could get young people involved in politics.
Now, one group of former Sanders' staffers is working to keep them involved.
More than a dozen former staffers have joined NextGen Climate, according to the group run by environmentalist billionaire Tom Steyer.
They're helping to organize millennials around climate issues and keep them engaged in the political process, as Democrats fear young people will stay home in November.
NextGen is running what they call the largest non-candidate student organizing effort in American political history. They plan to register and organize students on over 200 campuses in seven states, including Nevada, Colorado, New Hampshire, Iowa, Ohio, Pennsylvania and Illinois, which has a competitive Senate race.