So here's coverage of a rally for Sanders in Madison, WI
They booked an indoor arena that seats 10,000.
Once it was full they pumped the audio to the standees outside, who may have been as many as 3,000 more.
Once it was full.
Compare to the Rick Santorum event in Iowa where the attendance was... one.
Not one thousand, not one hundred, not one dozen. One.
I would feel bad for him if only he wasn't a vicious bigot who wants to increase the net amount of misery in the world.