Last night, NBC’s Andrea Mitchell and Lauren Stephenson reported that the veterans group Rolling Thunder had not invited Sarah Palin to their annual ride taking place this weekend and were dumbfounded when Palin announced her participation as the start of her bus tour. Under the headline “Stealing Their Thunder,” Mitchell suggested that Palin was hijacking their “very serious purpose” with her participation. The piece hinges on an interview with Rolling Thunder’s Ted Shpak, who called Palin’s announcement “a big distraction”: One day after Sarah Palin announced her bus tour, a group sponsoring a Memorial Day weekend event she plans to...