Former White House chief of staff William Daley abruptly dropped out of the race for Illinois governor Monday, signaling he wasn't sure he wanted to devote time to a long, hard campaign followed by at least four years in office. The decision leaves Gov. Pat Quinn without a prominent challenger in the Democratic primary next March, unless another candidate makes a late entry into the race. Daley spokesman Peter Giangreco confirmed that the son of late Mayor Richard J. Daley and brother of former Mayor Richard M. Daley was ending what many had believed would be a serious challenge to...