President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE on Thursday warned Russia to stop its “destabilizing activities” in Ukraine and around the world.

During a speech in Poland, the president said the United States must work to combat “new forms of aggression.”

“We urge Russia to cease its destabilizing activities in Ukraine and elsewhere and its support for hostile regimes, including Syria and Iran,” Trump said.

Russia has had a military presence in Ukraine since 2014, when it annexed Crimea, and has been accused of materially supporting armed separatists in eastern Ukraine. It has also militarily and politically helped prop up the governments of Syrian President Bashar Assad during the country’s ongoing civil war.

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“We cannot accept those who reject our values and who use hatred to justify violence against the innocent,” Trump said at the Three Seas Initiative Summit in Warsaw.

“To meet new forms of aggression, including propaganda, financial crimes, and cyber warfare, we must adopt our alliance to compete effectively in new ways and on all new battlefields,” he said.

The speech comes several months after a declassified report from the intelligence community concluded that Russian President Vladimir Putin Vladimir Vladimirovich PutinFBI chief says Russia is trying to interfere in election to undermine Biden Traces of nerve agent found in water bottle in Navalny's hotel room, colleagues say Russia: US trying to foment revolution in Belarus MORE called for an influence campaign aimed at helping Trump win the White House.