OVER the last two elections, the Republican Party regained control of the United States Senate by electing new senators in Florida, Georgia, Minnesota, Missouri, North Carolina, South Carolina, South Dakota and Texas. These victories were attributable in large measure to the central demand made by Republican candidates, and heard and embraced by voters, that President Bush's nominees deserved an up-or-down decision on the floor of the Senate. Now, with the withdrawal of Harriet Miers under an instant, fierce and sometimes false assault from conservative pundits and activists, it will be difficult for Republican candidates to continue to make this winning...