Rulings could mean easier paths to reelection for some New Mexico incumbents. SANTA FE — If he rebuffs a primary challenge, U.S. Sen. Ben Ray Luján is set to avoid a Republican opponent in his bid for a second term, after a potential GOP opponent was disqualified Tuesday for failing to meet ballot requirements. The disqualification of Republican candidate Christopher Vanden Heuvel of Rio Rancho means that for the first time in modern state history the state's general election ballot for a U.S. Senate race will have only one major party candidate. In all, [Democrat] Secretary of State Maggie Toulouse...