Ukrainian President Volodymyr Zelensky’s visit to a Pennsylvania factory making ammunition in its fight against Russia has prompted Republican lawmakers to cry foul and accuse him of campaigning for Democrats in a key state.

Zelensky visited the factory to thank American munitions workers as part of a broader U.S. trip that will include Washington, D.C., later in the week. Some Republicans, however, told the Washington Examiner they saw a more sinister motive to stump for Democrats in the crucial swing state just weeks before the elections.