NYT: She is such an overwhelming favorite in presidential primary polls that most prominent Democrats are taking a pass on challenging her. Is there any way a Democratic challenger could beat Hillary Rodham Clinton?

We asked three of the smartest Democratic strategists we know to imagine this situation: You are running the campaign of a liberal Democrat against Mrs. Clinton. You have $50 million to spend. What is your message? How do you run against her?

- Senator Elizabeth Warren of Massachusetts and her economic populism
- Senator Christopher S. Murphy of Connecticut, a foreign policy dove
- Former Gov. Martin O’Malley of Maryland, an anti dynastic foil