Brooklyn crowd was humongous. Does that show Sanders momentum?

Bernie Sanders draws big crowds. He’s proven that throughout his campaign for the Democratic presidential nomination. And Sunday he drew his biggest crowd yet, according to aides: 28,000 people at a rally in Brooklyn’s Prospect Park.

...Does the sheer size of this audience – which packed the park – show that Sanders’s assertion is right? When it comes to rallies, do numbers and enthusiasm indicate a candidate on the move?...
http://www.csmonitor.com/USA/Politics/Decoder/2016/0418/Brooklyn-crowd-was-humongous.-Does-that-show-Sanders-momentum