For years, the United States has insisted that Crimea is still part of Ukraine. Yet the Biden administration has held to a hard line since Russia’s invasion of Ukraine, refusing to provide Kyiv with the weapons it needs to target the Crimean Peninsula, which Russia has been using as a base for launching devastating strikes. Now that line is starting to soften. After months of discussions with Ukrainian officials, the Biden administration is finally starting to concede that Kyiv may need the power to strike the Russian sanctuary, even if such a move increases the risk of escalation, according to...