Should newspapers identify party affiliation of Op-Ed writers?

Bergen County Executive Dennis McNerney, a Democrat, has proposed some regionalization of local government services, which prompted The Record to run a pair of Op-Ed items from small-town Mayors who oppose the possible challenge to their home rule. Should the newspaper have noted that both the Mayors — Sophie Heymann of Closter and George Fosdick of Ridgefield Park — are registered Republicans?

Should newspapers identify party affiliation of Op-Ed writers?