WASHINGTON - President Bush , trying to salvage an immigration overhaul legislation, endorsed a plan Thursday that would lock in money for border security as way to win over conservative lawmakers and a skeptical public. Bush got behind a propos, , ) of South Carolina, have proposed such an amendment. The provision would immediately divert $4.4 billion toward border security, with that amount to be paid back once new fees are in place. The point would be to ensure that border security would not be subject to the whims of the yearly budget negotiations. With many questions unanswered, it was...