A three-way summit meeting in Tehran between the leaders of Russia, Iran and Turkey sent a clear signal that Vladimir Putin is pushing back against ostracism from the West. President Vladimir V. Putin and Iran’s president, Ebrahim Raisi, at a news conference in Tehran on Tuesday.Credit…Arash Khamooshi for The New York Times President Vladimir V. Putin left Russia for a rare international trip on Tuesday and received a handsome reward: a meeting with a prominent world leader who voiced a full-throated endorsement for Russia’s invasion of Ukraine. Traveling to Iran, Mr. Putin worked to solidify an Iranian-Russian alliance that has been emerging as a significant counterweight to American-led efforts to contain Western adversaries. He met with Ayatollah Ali Khamenei, Iran’s supreme leader, who issued a declaration of support for Mr. Putin’s war in Ukraine of the kind that even other countries close to Russia have so far stopped short […]