MADRID — NATO’s top official said Tuesday that Turkey had dropped its objections to the membership of Sweden and Finland, two historically nonaligned nations that, alarmed by Russia’s invasion of Ukraine, have asked to join the military alliance.
Turkey’s reversal is a blow to President Vladimir V. Putin, who in justifying the invasion of his neighbor bitterly protested previous expansions of NATO — and Ukraine’s efforts to join the alliance — as a threat to his country’s…
