With dozens of “Don’t Tread On Me” flags lifting in the breeze and a bristle of signs objecting to most of what comes out of Washington, it was clear the Tea Party crowd gathered outside Dallas City Hall on Saturday was spoiling for an Election Day fight. And then the immortal words of Twisted Sister added a pulsing exclamation point: “We’re not gonna take it/No, we ain’t gonna take it.” Celebrating the first anniversary of the anti-big -government Tea Party movement, the crowd that organizers estimated at 2,000 heard passionate pleas for what they call the nation’s founding principles: smaller...