In their battle to replace former Rep. Randy “Duke” Cunningham, Republicans are embracing their party's ideals while distancing themselves from its record in Washington. As deficits balloon and scandals multiply under a Republican-controlled Congress, these candidates are touting independence over party loyalty and lashing out at the GOP as often as they criticize Democrats. Setting the tone is millionaire businessman Eric Roach, whose television commercials ask, “When did Congress begin losing touch?” “I think it began when Republicans quit being Republicans,” Roach answers in the ad. “You know, they were sent to Congress to bring the budget in balance, to...