Biden Poised to Approve Ukraine’s Use of Long-Range Western Weapons in Russia

President Biden appears on the verge of clearing the way for Ukraine to launch long-range Western weapons deep inside Russian territory, as long as it doesn’t use arms provided by the United States, European officials say.

The issue, which has long been debated in the White House, is coming to a head on Friday with the first visit to Washington by Britain’s new prime minister, Keir Starmer.

Britain has already signaled to the United States that it is eager to let Ukraine use its “Storm Shadow” long-range missiles to strike at Russian military targets far from the Ukrainian border. But it wants explicit permission from Mr. Biden in order to demonstrate a coordinated strategy with the United States and France, which makes a similar missile. American officials say Mr. Biden has not made a decision, but will hear from Mr. Starmer on Friday.

If the president approves, the move could help Ukraine hold the line after it seizes Russian territory, as it did during its surprise incursion into Russia’s Kursk region. But Mr. Biden has hesitated to allow Ukraine to use American weapons in the same way, particularly after warnings from American intelligence agencies that Russia could respond by aiding Iran in targeting American forces in the Middle East.

On Thursday, White House officials insisted there was no imminent decision on the use of the American-made surface-to-surface Army Tactical Missile Systems — known as ATACMS. But Mr. Biden himself has signaled that a loosening of restrictions is coming. He was asked on Tuesday whether he was ready to grant the increasingly insistent requests from President Volodymyr Zelensky of Ukraine.

“We are working that out right now,” he said.

If Mr. Biden permits the British and French to go ahead,