in terms of the actual mechanics of what is going on, this article is an excellent resource:
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http://www.commondreams.org/views06/0128-21.htmMr. Smith Comes to Washington
by Paul Savoy
How many senators does is take to launch a filibuster? If you said 41, you’d be wrong. It takes only one.
The term, filibuster, from a Dutch word meaning "pirate," describes a hallowed tradition of unlimited debate in the Senate based on the principle that any senator has the right to talk his head off for as long as he wants on any issue. That is, until at least 60 senators vote to shut him up.
In the classic Frank Capra film, "Mr. Smith Goes to Washington," Jimmy Stewart, playing freshman Senator Jefferson Smith, carries on a one-man filibuster for more than 23 hours until he passes out from exhaustion. Smith, an idealistic senator from an unnamed state, reads from the Declaration of Independence, and summons his colleagues to get up there with that Lady of Liberty on top of the Capitol Dome and take a stand against "compromise with human liberties."
Senator John Kerry, in announcing that he and Senator Edward Kennedy would participate in a filibuster against the confirmation of Judge Samuel Alito, said, "It’s not ‘Mr. Smith Goes to Washington.’ . . . It takes more than two or three people to filibuster successfully."
At least five other Democrats have announced their support for the filibuster: Senate Minority Leader Harry Reid, Assistant Minority Leader Dick Durbin, Dianne Feinstein, and Hillary Rodham Clinton. But, in trying to block the confirmation, each of these senators may have to be a "Senator Smith" to succeed in demonstrating the danger a Justice Alito would pose to civil rights and civil liberties.
Judiciary Committee Chairman Arlen Specter has defended Judge Alito’s refusal to answer specific questions from Democratic senators aimed at showing the American people just how frightening a Justice Alito would be. The distinguished senator from Pennsylvania has declared that the nominee "has answered questions as far he could go." Judge Alito said it would not be "appropriate" for a judicial nominee to express his views on issues that might come before him if he were appointed to the Court. Well, it turns out that Judge Alito and Senator Specter are wrong. Who says? The Supreme Court. That’s who says.
In 2002, the Supreme Court, in Republican Party of Minnesota v. White, 536 U.S. 765, declared that it is not only proper for a judicial candidate to express his views on disputed legal issues -- the First Amendment guarantees him the right to do so. In an opinion written by Justice Antonin Scalia, and joined by then-Chief Justice Rehnquist, and Justices O’Connor, Kennedy, and Thomas, the Court concluded that a Minnesota canon of judicial conduct which prohibited a candidate for judicial office from announcing his position on abortion rights and other controversial issues violated his right to freedom of speech under the First Amendment.
...much more, read it...