Ask Democrats which of their leaders they like (other than Barack and Hillary, of course) as they gather for their national convention in Denver, and Jimmy Carter and Al Gore lead the pack. More Democrats have a Very Favorable opinion of Independent Senator Joe Lieberman than of the party's Senate Leader Harry Reid and up-and-comer Mark Warner, the former governor of Virginia now running for the Senate. But the Connecticut Democrat, the party's vice presidential nominee in 2000 who is now expected to speak at the Republican national convention next week, has much higher negatives. .............. Fifty three percent of...