One year ago today, then-Congressman Todd Akin uttered his now-famous “legitimate rape” remark that helped Sen. Claire McCaskill. Could it happen again? Could another GOP office-seeker make a similarly devastating gaffe? Some Republicans say it could. They say they remain mired in a tendency to nominate the most conservative candidates such as Akin, who struggle to sell themselves to general-election voters who tend to reward more moderate candidates.