"You're like Zell Miller without the crack," Jon Stewart once told Nebraska Senator Ben Nelson. Lately, though, it looks like Nelson may be taking hits from the pipe.Nelson, the Senate's most conservative Democrat, is drafting legislation to give bipartisan cover to Bill Frist's plan to outlaw the filibuster of judicial nominees, known as the "nuclear option." Nelson's proposal would bar the use of the filibuster and allow any Senator to call an up-or-down floor vote on any judicial nominee, even if the Senate Judiciary Committee blocks the nomination.Essentially, Nelson is doing Frist's controversial bidding for him, at a time when...