(CBS) The latest CBS News poll finds President Bush's approval rating has fallen to an all-time low of 34 percent, while pessimism about the Iraq war has risen to a new high. Americans are also overwhelmingly opposed to the Bush-backed deal giving a Dubai-owned company operational control over six major U.S. ports. Seven in 10 Americans, including 58 percent of Republicans, say they're opposed to the agreement. CBS News senior White House correspondent Jim Axelrod reports that now it turns out the Coast Guard had concerns about the ports deal, a disclosure that is no doubt troubling to a president...