WASHINGTON - Senate Democrats opposed to John R. Bolton asked one of his GOP supporters to be a go-between in their pursuit of information that could break an impasse over his nomination to be U.N. ambassador. At the same time, a Democratic lawmaker said the Bush administration has made overtures to try to get the nomination to a final vote. "The White House did make some proposals which didn't really do it, but they're reaching out a little bit," Sen. Barbara Boxer (news, bio, voting record), D-Calif., told reporters Thursday. Democrats have demanded to know more about communications intercepted by...