With the help of a Gallup poll, Ambers sorts it out :

It's true that just half of those Tea Parties surveyed called themselves Republicans. Yes, the lion's share of the other half say they're independent. But they're not: they're Republican-oriented conservative voters who are dismayed by the direction of the GOP and who don't want to identify with the party's brand. That's not surprising, given how tarnished that brand is. Only 8% identify as Democratic; 7% identify as liberal; 70% percent identify as conservative; two-thirds are pro-life; nearly 90% were opposed to the health care bill.

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