WASHINGTON — The Senate’s decisive vote to approve a new package of stiff financial sanctions against Russia, Iran and North Korea sends the popular bill to President Donald Trump, who will be under pressure to sign it after weeks of intense negotiations.

Trump’s likelihood of supporting the measure is a remarkable concession that the president has yet to sell his party on his hopes for forging a warmer relationship with Moscow. Trump’s vow to extend a hand of cooperation to Russian President Vladimir Putin has been met with resistance as skeptical lawmakers look to limit the executive power’s leeway to go easy on Moscow over its meddling in the 2016 presidential election.

The Senate passed the bill, 98-2, two days after the House pushed the measure through by an overwhelming margin, 419-3. Both are veto proof numbers as the White House has wavered on whether the president would sign the measure into law.

Never in doubt, however, was a cornerstone of the legislation that bars Trump from easing or waiving the additional penalties on Russia unless Congress agrees. The provisions were included to assuage concerns among lawmakers that the president’s push for better relations with Moscow might lead him to relax the penalties without first securing concessions from the Kremlin.

The legislation is aimed at punishing Moscow for interfering in the 2016 presidential election and for its military aggression in Ukraine and Syria, where the Kremlin has backed President Bashar Assad.

Sen. John McCain, R-Ariz., said the bill’s passage was long overdue, a jab at Trump and the GOP-controlled Congress. McCain, chairman of the Armed Services Committee, has called Putin a murderer and a thug.

“Over the last eight months what price has Russia paid for attacking our elections?” McCain asked. “Very little.”