The US president earlier called it “impossible” for the peninsula, which voted to join Russia in 2014, to return to Kiev’s control Ukrainian leader Vladimir Zelensky has rejected US calls to withdraw its claim to Crimea or make any territorial concessions to Russia. In a speech marking Ukraine’s Independence Day on Sunday, Zelensky vowed to retake the peninsula, which is predominantly populated by ethnic Russians and overwhelmingly voted to join Russia after the 2014 Western-backed coup in Kiev.