Top conservative leaders have written President Bush telling him to drop his insistence on a guest-worker program and a path to citizenship for illegal aliens and instead support the 85 percent of congressional Republicans who want to tighten law enforcement first. Signers include William J. Bennett, Robert H. Bork, Ward Connerly, David A. Keene, Phyllis Schlafly and a number of think-tank academics and pundits. The immigration debate is the first major issue on which Mr. Bush finds himself opposing a majority of Republicans in Congress and depending on Democrats to deliver a victory. In their letter, the conservatives tell Mr....