From Merriam-Webster:

Main Entry: rab·ble
Pronunciation: \ˈra-bəl\
Function: noun
Etymology: Middle English rabel pack of animals
Date: 14th century
1 : a disorganized or confused collection of things
2 a : a disorganized or disorderly crowd of people : mob
2 b : the lowest class of people

With that definition in mind, check out Chris Matthews' analysis of President Obama's speech at West Point.

He calls the United States Military Academy the "enemy camp" and says Paul Wolfowitz went there to "rabble rouse," thereby calling the USMA Corps of Cadets "rabble."

But don't question his patriotism.