President Joe Biden met with Ukrainian President Volodymyr Zelenskyy in Paris on Friday as the United States clashes with its ally and with the Kremlin over supplies of American weapons.

Biden offered a first public apology for the monthslong delay in U.S. military aid that Russia has exploited to make crucial battlefield advances. He also announced a new package of $225 million in weapons, including air defense interceptors, artillery ammunition and other critical capabilities.

“I assure…