Sen.  John  McCain, R-Ariz., left, waves to supporters at an election victory party with his wife Cindy  McCain, Tuesday in Phoenix. McCain survived his toughest Republican election primary in years, beating former congressman J.D. Hayworth. Story here. (AP Photo/Ross D. Franklin)

Question: McCain survived an election challenge from a Tea Party favorite in Arizona, while Lisa Murkowski appears to have lost to another Tea Party candidate in Sarah Palin's Alaska. How would you rate the Tea Party's impact on elections held so far this year?