By Paul Bedard, Washington Whispers
The growth of the right-leaning tea party movement has prompted talk of a third-party challenge to President Obama and the eventual GOP nominee. The reason: If tea party activists don't like the GOP nominee, they'll bolt. Many pollsters see Sarah Palin leading that wing, though polls show voters have fallen out of love with her. "I want Sarah Palin," grins Democratic pollster Stan Greenberg. But he doesn't accept talk of a primary challenge to Obama from a moderate Democrat like Indiana Sen. Evan Bayh, who shocked Washington this week by announcing his retirement.