As most of us realize, the Tea Party movement is not a national political party. There is no formal structure.
"I call it small government, grass-roots activism: The Tea Party activists are a part of it, FreedomWorks is part of it. FreedomWorks is the longest-standing, most active organization within this movement." -- Dick Armey
The movement came about amongst everyday Americans in response to the progress of our country toward degradation of our founding principles. The anger found within exists because too many politicians believe not that they represent and lead us in "deriving their just powers from the consent of the governed," but instead show in attitude/actions that they believe they are above "we the people," and entitled to special privileges and authority.
"I don’t know if it’s the water, something in the air, the cherry blossoms, but people get here and they stop listening to the American people.” --Ted Cruz
Tea party people, and not just tea party people, are against the socialistic policies of the Democrats and are bravely against Republicans who go along to get along. For many, the Republican party as a whole is no longer conservative and needs to be reined back to the center ideals which formed the party.
"You could accuse Republicans of a lot of things, but you could never convict us of being too conservative." --Jim DeMint
Even though various groups sprouting from the original outrage against changes in our traditions may have differing priorities, the mark of a Tea Party patriot is centered on belief in the Constitution and other foundational documents.
How is that radical or extreme?
"....when I see people talking about the tea party, I don't think of the tea party as extremists the way some of the folks in Washington want to describe them. The extremist in Washington is Barack Obama. He's the guy that wants to fundamentally transform our health care system. He's the guy who has done enormous damage to America's standing in the world. To the extent there is an extremist or radical political view in Washington these days, I believe it is the president of the United States." --Dick Cheney Source