U.S. President George W. Bush's twilight effort to make peace between Israel and the Palestinians faces far more challenges than his predecessor Bill Clinton's failed attempt in 2000. In his waning months in office, Bush is trying to resolve the intractable conflict when the Palestinians are divided, Israel's prime minister is unpopular and the U.S. president's own credibility has been eroded by the Iraq war. Diplomats, former negotiators and regional analysts said they welcomed Bush's decision to host a conference on Tuesday in Annapolis, Maryland, that he hopes will trigger formal negotiations on creating a Palestinian state. But given the...