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. "We're going to show the American people that the promises in this bill will be kept," Bush said in a speech to the Associated Builders and Contractors. Bush got behind a proposal to set aside money collected through fees and penalties for tougher border security and workplace enforcement. Two Republican senators, John Kyl of Arizona and Lindsey Graham (news, bio, voting record) of South Carolina, have...