Will Impeachment Resistance Cost Nancy Pelosi Her House Leadership Seat?

As Anonymous points us to in comments, there is an effort underway to remove House Speaker Nancy Pelosi from her leadership role due to her resistance (and she's hardly the only one) to bringing impeachment proceedings against either Bush, Cheney, or the entire Bush Administration.

Considering recent polls say that about 70% of Americans believe the Bush Administration has committed "high crimes and misdemeanors" and more than 50% believe they warrant impeachment proceedings, it's harder and harder to understand why the Dem leadership in Washington is so desperate to keep votes like Dennis Kucinich's impeachment motion against Cheney off the floor.