For a minute there, it looked like Bernie Sanders might be a something more than a goofy left-wing sideshow. However, it now it's starting to appear that Bernie's brief moment has come and gone. Hillary has cemented herself as the Democrat frontrunner and (barring some kind of shake up) Bernie's cadre of fans is headed for disappointment. That said, Bernie's 15 minutes of fame aren't quite over, and he's doing what he can to draw attention to himself.
Basically, that means he's yelling, shouting, and pointing. You might argue that this is nothing new, but he has changed course somewhat. He's gone decidedly negative in recent days as he attacks Hillary for flip-flopping on a host of issues: (video below)