Except for the presidential election, the most important election this year will take place on April 27 in Pennsylvania. That's the day of the Republican primary pitting a great Republican, Pat Toomey, against the 74-year-old, Ira Einhorn-defending alleged "Republican," Arlen Specter. No, it's not the "American Idol" finals. It's even more important than that. Thanks to Arlen Specter: States can't prohibit partial-birth abortion; Voluntary prayer is banned at high-school football games; Flag-burning is a constitutional right; The government is allowed to engage in race discrimination in college admissions; The nation has been forced into a public debate about gay marriage;...