For wearing a hoodie and sunglasses.
[via The Free Beacon]
This whole "movement" surrounding hoodies started with Geraldo Rivera and his, umm, stupid comments about Trayvon Martin's hoodie.
That said, Congressman Rush (D-IL) was in violation of House Rules of Decoroum (my emphasis):
Rule XVII - Decorum And Debate... so he deserved to be removed from speaking.
Call to order
4. (a) If a Member, Delegate, or Resident Commissioner, in speaking or otherwise, transgresses the Rules of the House, the Speaker shall, or a Member, Delegate, or Resident Commissioner may, call to order the offending Member, Delegate, or Resident Commissioner, who shall immediately sit down unless permitted on motion of another Member, Delegate, or the Resident Commissioner to explain. If a Member, Delegate, or Resident Commissioner is called to order, the Member, Delegate, or Resident Commissioner making the call to order shall indicate the words excepted to, which shall be taken down in writing at the Clerk's desk and read aloud to the House.