ANY POLITICAL consultant will tell you there is little reason for an incumbent to debate a challenger. In a live forum, there is the remote chance an incumbent will say something that backfires, which is why some politicians won't debate unless they are in a competitive race and fear losing office. In 2004, Rep. Pete Stark, D-Fremont, beat GOP challenger George Bruno with 72 percent of the vote to Bruno's 24 percent -- so you have to credit Stark for appearing at a League of Women Voters debate at Fremont's Comcast studios Thursday. I showed up to see if Stark's...