Leading suburban Republicans said Tuesday the decision by veteran GOP U.S. Rep. Henry Hyde to not seek re-election next year could result in a torrent of candidates vying to replace him and create a potentially costly primary contest for a seat that Democrats are likely to aggressively target. Patrick Durante, a longtime Hyde aide who also is head of the Addison Township Republican organization, estimated a hard-fought primary contest in the 6th Congressional District could cost a contender $1 million or more to gain the name recognition and support necessary to win in March. And for some of the candidates...