President Trump and U.S. lawmakers should consider revising sanctions targeting Russia so they focus more on Russian oligarchs, a senior Republican lawmaker suggested after participating in a congressional delegation visit to Moscow.

“You do something and nobody ever sits back and analyzes, ‘Well, is it working?’” Sen. Ron Johnson, R-Wis., told the Washington Examiner. “And I think you’d be hard-pressed to say that sanctions against Russia are really working all that well.”