James Webb, who has claimed to be an "independent" voice, has refused to rule out joining them.
Casey, Webb, Ford & Tester Agree To Schumer Filibuster Pact
Schumer is reported to have assured Democrats that Bob Casey Jr. — despite running as a moderate Senate candidate — would be supportive of Democratic efforts to block constitutionalist judicial nominees. “There’s no worry on judges,” said Schumer. “And judges is the whole ball of wax.” Other supposedly centrist Democratic candidates including Harold Ford Jr. (Tenn.), Jon Tester (Mont.) and Jim Webb (Va.) have refused to rule out filibusters against judicial nominees.
This could be very important, because of other rumors circulating about Justice Stevens:
For the past several weeks, there has been a rumor circulating among high-level officials in Washington, D.C., that a member of the U.S. Supreme Court has received grave medical news and will announce his or her retirement by year’s end.
Here's the irony -- the democrats have launched an assault on the judiciary, making it into a political arm of their party after a history of judicial independence (as shown by the fact that, while 7 of the current justices were appointed by republican administrations, that includes some of the most liberal justices, including Justice Stevens himself, along with David Souter -- and also some of the justices the democrats speak highly of, like O'Connor and Kennedy.
But because the justices have become so active in writing laws, some single-issue voters became highly motivated to ensure that justices were picked who would give power back to the people. If it weren't for the Supreme Court picks, I wouldn't be surprised to see social conservatives let the democrats have the senate, but with a judge position on the line, the social conservatives will come out in force.