Since then, at least 60 national groups including MoveOn.org and the Service Employees International Union have signed on to participate in Brar's local protest, signaling a huge turnout. A protest permit filed with the Chicago Department of Transportation estimates a crowd of 6,000 people, though he's optimistic that those groups, along with a sizable portion of the 10,000 people who indicated they would attend via the Tax Day Facebook page he set up, will boost attendance. But he says he's ready to march all by himself.