Sen. Hillary Rodham Clinton, a potential White House candidate in 2008, said Wednesday some Republicans are trying to create a "police state" to round up illegal immigrants. Clinton, D-N.Y., spoke out on the U.S. immigration policy after largely staying away from an issue that has roiled Congress in recent months and spurred a number of conflicting proposals. Speaking at a rally of Irish immigrants, Clinton criticized a bill the House passed in December that would impose harsher penalties for undocumented workers. "Don't turn your backs on what made this country great," she said, calling the measure "a rebuke to what...