Opposition mounts against Bush's UN choice

President George Bush’s nomination of John Bolton to be UN ambassador has been shaken again by a Republican senator’s surprise opposition to the embattled nominee, and Democrats hope to seize the opportunity and defeat him in the Senate.

At a minimum, they will play for delay, make the White House squirm and renew accusations that Bolton was overly aggressive as the State Department’s top arms-control official, pushing his views and trying to damage the careers of officials who disagreed with him.