WASHINGTON( Reuters)-The United States imposed sanctions on Wednesday on two men linked to a Russian" ethnically motivated violent extremist group," one of whom visited the United States to connect with far-right groups while the other funded pro-Russian fighters in the Donbas. The U.S. Treasury said it targeted Stanislav Shevchuk, a Europe-based Ukrainian who served as a representative of the Russian Imperial Movement( RIM) and who traveled to the United States in 2017 seeking connections with"