Senate leaders say they have reached a deal to revive a broad immigration bill that could provide millions of illegal immigrants a chance to become American citizens. The agreement doesn't involve provisions of the law, but it does end, for now, a lingering political standoff. The agreement brokered by Senate Majority Leader Bill Frist, R-Tenn., and Minority Leader Harry Reid, D-Nev., breaks a political stalemate that has lingered for weeks. Key to the agreement is who will be negotiating a compromise with the House and its tough enforcement-only bill. The House passed much more strict immigration legislation in December. It...