Is there any way to minimize Russia’s ability to spread fake news on social media and legitimate news outlets? Sen Martin Heinrich (D-N.M.) asked a counter-terrorism expert on Thursday. The witness, Clinton Watts, proposed a rating system for news reports, to be developed by an independent agency. The ratings would act like nutrition labels on food, he said, so “you know what you’re consuming.” The Russians aren’t the only ones pushing fake news, Watts told the Senate Intelligence committee. Watts, a senior fellow at the Center for Cyber and Homeland Security at George Washington University, said profiteers, political groups and...