For nearly three weeks, Scott Brown’s campaign has been battering Elizabeth Warren for listing herself as a Native American on a legal directory and then being billed as a minority law professor at Harvard University. Now, Warren has a Democratic critic, too. Warren’s primary opponent, Marisa DeFranco, who is trying to raise her profile in the race, is arguing that voters should be concerned about Warren’s “lack of a clear, consistent message” in response to the Native American controversy. “I’m not sure what her answer is because it’s been so various,” DeFranco said today. DeFranco said that, in general, it...