The "Tea Party Movement" was born out of the politically conservative right wing of American politics.
The "Movement" has its origins in the 2008 McCain-Palin campaign, when the campaign repeatedly made suggests, ranging from the ambiguous to the pointed, that Barack Obama "palled around with terrorists", "could not be trusted" and wasn't a "real American".
The first signs of violence in the "Movement" came in September of 2008, when it was first reported that McCain-Palin supporters were showing up to both McCain and Obama rallies armed with loaded guns.
The beginnings of the "Movement" were chronicled on YouTube in McCain-Palin rallies of McCain-Palin supports outside of rallies in October, 2008.
The "Movement" intensified after the election of Barack Obama during the prelude to the economic stimulus bill.
The "Movement" involves, and provides an ideological safe haven for racism, xenophobia, conspiracy theory, and irrational fears and beliefs that Barack Obama is a socialist / communist / Arab/ Muslim / terrorist / illegal immigrant.
The "Movement" has been promoted by Fox News and it's media personalities Glenn Beck, Sean Hannity, and Bill O'Reilly.
The "Movement" can be characterized, generally, as anti-government, anti-tax, anti-healthcare reform, and anti-liberal.
Joseph A. Stack, the man who flew his single-engine aircraft into an IRS building Austin, TX killing two people, was a self-professed member of the "Movement" and his domestic terrorist attack was politically motivated.
Senator Scott Brown (R-MA) defended Stack's actions and said it was "populist rage" that motivated his domestic terrorist attack.
John Patrick Bedell, the man who shot two police officers near the Pentagon a few days ago was also a far-right conservative member of the "Movement".
The "Movement" has no real leader, and therefore no organization or person to hold accountable for the recent spat of violence perpetrated by "Tea Party" supporters.