PINELLAS PARK, Fla., Oct. 23 — Religious conservatives say that with an arsenal of prayer vigils, Christian radio broadcasts and thousands of e-mail messages to Florida lawmakers, they played a pivotal role in the legislative battle this week over whether to feed a brain-damaged woman who has been kept alive artificially for 13 years. Now some conservatives are hoping to use similar tactics to help them challenge court rulings they opposed in other states. Randall Terry, founder of the anti-abortion group Operation Rescue, said he and other conservatives intended to use what they consider a stunning victory here to pressure...