Democrats think they wounded President Trump, but they've thought that before. In an era of political bubbles and fragmented media, yesterday's seemingly damning testimony might not have moved the needle at all. Plus, is the case for impeachment weakened by its reliance on hearsay? And does Rudy Giuliani have a Trump card to play? CNN political director David Chalian dives into these questions and more with CNN White House reporter Stephen Collinson and CNN political commentator Matt Lewis.

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