WASHINGTON - They heeded a pamphleteer’s call for ‘manly opposition to the machinations of tyranny’ - the 60 American colonists who stormed Griffin’s Wharf and emptied 342 chests of tea into Boston Harbor. And with that, a revolution brewed. Now, more than two centuries later, come the angry throngs of the modern-day tea party. They’ve gotten the nation’s attention. Can they foment their own revolution? Not yet. The Associated Press reviewed tea party operations in almost every state, interviewing dozens of local organizers as well as Democratic and Republican strategists to produce a portrait of the movement to date - and its prospects for tilting this November’s elections. The bottom line: Though amplifying widespread voter anger at the political establishment, the tea party movement is unlikely to dramatically affect the congressional elections - unless their local affiliates forge alliances with Republican candidates. And how likely is that? Republican operatives look at the possibility of GOP-tea party collaborations with some anxiety, and many tea party activists frankly don’t want to see them. Born of protest and populism, the United States is a nation of movements - people galvanized by causes, summoned with the latest technologies. […]