Russian Senator Alexei Pushkov said Friday that U.S. President Donald Trump and senior members of his administration differ on Russia, CNN is reporting.

His comments, made on Twitter, came a day after Secretary of Defense James Mattis and Secretary of State Rex Tillerson talked about Russia as they attended summits in Europe, according to the news network.

"Trump hopes to make a deal with Russia," tweeted Pushkov, chairman of the Information Policy Committee in Russia's upper house of parliament. "Mattis thinks (in vain) that he can put pressure 'from a position of strength.' Tillerson is playing a 2nd Kerry. Three lines from 1 administration."

Mattis, who was at a NATO conference in Brussels, Belgium, said the U.S. was "not in a position right now" to collaborate with Russia on military matters. And he spoke of the need to negotiate with Russia "from a position of strength," according to CNN.

Mattis also claimed Russia was violating international law and called its actions "aggressive" and "destabilizing." He said there was "very little doubt" Russia had interfered or attempted to interfere in a number of democratic elections.

Tillerson, who took over from John Kerry in the State Department and was at a G20 summit in Bonn, Germany said the U.S. would consider working with Russia on some issues. But he noted the U.S. would stand up for its allies, including on the side of Ukraine, whose Crimea territory was annexed by Russia.

He called on the Kremlin to deescalate violence in eastern Ukraine.

Meanwhile Pushkov warned Trump to stay aware of the politics in Washington.

"It's highly likely that it won't be Trump draining the 'Washington swamp' but the swamp itself will drag in Trump," he tweeted. "And that will be the end of his revolution that never started."

Meanwhile, The New York Times also noted the mixed signals coming from the Trump administration.

"Mr. Mattis's rejection of stronger ties… came amid a flurry of mixed messages about the outlook for improvement in the American-Russian relationship under the Trump administration," the newspaper said.

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