Sen. Kamala Harris (D-Calif.), a presidential candidate, said in an interview broadcast Sunday that Russian interference in the 2016 presidential election made clear that race is the “Achilles heel” of the U.S. “[T]hey decide to attack what is the strongest pillar of a democracy, which is free and open elections … And they tried out a bunch of different things. And you know what caught heat? The issue of race. So Russia exposed America's Achilles heel,” Harris said on NBC’s “Meet the Press.” “And all of a sudden then, guess what? For those who want to marginalize the conversation about...