Vice President Mike Pence on Monday warned against election interference at the hands of Russians shortly after President Donald Trump renewed his call for the nation to be readmitted to the Group of 7.

“With its efforts to meddle in elections across Europe and around the world now is the time for us to remain vigilant about the intentions and the actions being taken by Russia,” Pence said at joint news conference with Polish President Andrzej Duda in Warsaw, Reuters reported.

Pence, who is wrapping up a two-day stay in the city, attempted to dispel any potential doubts from Poland over whether the U.S. is committed to safeguarding its ally from election meddling. Trump has failed to treat the issue seriously despite findings from the U.S. intelligence community indicating Russia played a role in the 2016 presidential election. Poland is preparing for parliamentary elections in October.

Trump told reporters at the White House last month that he would support Russia rejoining the G-7, a stance other countries don’t share.

“I think it’s much more appropriate to have Russia in,” he said, echoing remarks he made last year. “It should be the G-8, because a lot of the things we talk about have to do with Russia.”

Trump then added that “if somebody would make that motion” to welcome back Russia, “I would certainly be disposed to think about it very favorably.”