"Russ better watch out." That remark was heard more than once from Democratic activists and others after Republican business executive Tim Michels' surprisingly strong victory in the U.S. Senate primary Sept. 14. Michels buried his better-known opponents, state Sen. Bob Welch, R-Redgranite, and car dealer Russ Darrow, immediately drawing the attention of senior national Republican strategists. If Bush can win Wisconsin, they figure, Michels can come in on the president's coattails, knocking off Feingold and building the Republicans' slim margin in the U.S. Senate. For Feingold, Michels is a more serious challenge than either Darrow or Welch would have offered...