WASHINGTON (AP) - The Terri Schiavo case has been catapulted from a drawn-out medical and legal battle into a fast-paced political drama with Congress, the White House and the courts playing leading roles. Republicans see a vote for prolonging the life of the brain-damaged Florida woman as an opportunity to strengthen their support among religious conservatives, a vital constituency group, ahead of next year's congressional elections. For the most part, minority-party Democrats are asserting that congressional involvement in such a heart-wrenching private matter is unwarranted and unwise. But they are treading carefully, not wanting again to get clobbered on the...