Russian Deputy Prime Minister Arkady Dvorkovich speaks during an interview at the St. Petersburg International Economic Forum (SPIEF), Russia, June 2, 2017. REUTERS/Sergei Karpukhin

MOSCOW (Reuters) - Washington is unlikely to ease sanctions against Russia because of internal politics, Russian Deputy Prime Minister Arkady Dvorkovich said on Thursday after meeting U.S. investors and delegation members at the World Economic Forum in Davos, Interfax news agency reported.