Doug Schoen: At third Dem debate, one big winner and two surprise losers

In the most contentious Democratic debate thus far, a winnowed field of 10 Democratic candidates took the stage in Houston Thursday night and sparred over hot-button issues such as health care and immigration.

Notably, this was the first time that frontrunners Sen. Elizabeth Warren and former Vice President Joe Biden shared the debate stage. At the end of the night, Joe Biden emerged as the winner and Warren and Sen. Bernie Sanders were the surprise losers.

Warren and Biden exhibited stark differences on style, policy and vision for the Democratic...