European Union Council President Donald Tusk said Thursday that his discussions with President Trump show the two leaders appear to have different positions on prominent issues including Russia.

Tusk said he isn't "100 percent sure" the two have "a common position, a common opinion, about Russia," according to The Associated Press.

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"Some issues remain open like climate and trade," he said, adding that the two leaders did have some commonalities including "first and foremost, on counter terrorism."

Tusk said it "seems that we were on the same line" on Ukraine as well.

Trump on Thursday met with European leaders in Brussels ahead of a NATO summit.

His visit comes as he faces various controversies at home related to Russia and the investigation into his campaign's alleged ties to Russian meddling in the 2016 presidential election.

On Wednesday, a report surfaced that U.S. spies collected intelligence months before the presidential election showing senior Russian officials discussing how to exert influence over Trump and his advisers.

Their discussions reportedly centered on former national security adviser Michael Flynn and Paul Manafort, Trump's campaign adviser at the time.

The Justice Department named a special counsel earlier this month to lead the Russia probe, which Trump has decried as a "witch hunt" that hurts the U.S.