Hot mics have a knack for revealing unguarded moments in politics. On Monday, one captured President Donald Trump and eight European leaders chatting at a White House news conference about Ukraine. Trump told French President Emmanuel Macron that Russian President Vladimir Putin wants to make a deal with him. Hot mics have historically caught leaders off guard, revealing their true thoughts. From President Ronald Reagan's joke about Russia to President Joe Biden's comment on the Affordable Care Act, these moments often reveal more than scripted speeches. Leaders are reminded that in public, privacy is a luxury.

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In 1860, the nation’s first successful silver mill began operation near Virginia City, Nevada.