Trump echoes Putin, calls Zelenskyy a 'dictator'

Bipartisan backlash to Donald Trump's attack on an American ally. Tonight: the historic stakes of Donald Trump's support of Vladamir Putin. Plus, Sen. Elizabeth Warren on the world's richest man and his takeover of American government. Sen. Bernie Sanders on his grassroots push to resist the Trump administration. And an exclusive interview with former FTC Chair Lina Kahn.

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