Next in line? Score one for Nebraska Democrats. They've snared Sen. Dick Durbin of Illinois as headline speaker at their Morrison-Exon Dinner on May 15. Durbin could be the next Senate majority leader if Sen. Harry Reid doesn't survive a tough re-election test in Nevada this November. And, of course, if Democrats maintain control of the Senate. If Reid goes down, Democrats are likely to choose between Durbin and Sen. Chuck Schumer of New York. Minnesota Rep. Tim Walz, a graduate of Chadron State College who was born in West Point, will also address the dinner to be held at...