WASHINGTON - The Senate opened debate on an election-year immigration bill Wednesday, and leading Republicans swiftly clashed over whether the legislation would amount to amnesty for millions of illegal residents in the United States. The legislation "goes too far in granting illegal immigrants with what most Americans will see as amnesty," said Senate Majority Leader Bill Frist of Tennessee, the first to speak on the bill. "I disagree with this approach ... because granting amnesty now will only encourage further and further disrespect for the law." Moments later, the chairman of the Senate Judiciary Committee, Sen. Arlen Specter (news, bio,...