Why do we have leap years?

Former U.S. Attorney Joyce Vance joins us to explain the implications of the Supreme Court hearing arguments in former President Donald Trump's immunity case. And, the Quincy Institute for Responsible Statecraft's Anatol Lieven explains his doubts that Ukraine will be able to win the war against Russia even with U.S. support. Then, Jackie Faherty from the American Museum of Natural History joins us to explain why we have leap years.

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