The Circus is in Poland tracking President Biden as he stuns the world with a visit to the embattled capital of Ukraine to mark the one-year anniversary of Russia's invasion. Host John Heilemann talks with National Security Advisor Jake Sullivan about the covert trip to Kyiv and the monumental challenges of confronting a nuclear armed Russia. Back in the U.S., Mark McKinnon speaks with Bush White House veteran Nicole Wallace, while Jennifer Palmieri sits down with former NATO Supreme Allied Commander Admiral James Stavridis. Season premiere.