Primaries: Tails You Lose

Only seven days after this week's Indiana primary, Robert Kennedy and Eugene McCarthy will meet on the fertile Republican turf of Nebraska for their second direct confrontation of the campaign.

Fortunately for the Democrats—especially Bobby—G.O.P. voters in the Cornhusker State cannot readily cross over party lines to register negative votes against either. While Richard Nixon is confident of garnering well over 60% of the Republican vote despite write-ins for Nelson Rockefeller, both Kennedy and McCarthy can concentrate exclusively upon courting the state's 276,000 registered Democrats, many of them conveniently clustered around the urban centers of Omaha and Lincoln, only 58...