The Senate Majority Leader is famously unflappable, but Mitch McConnell yielded to pressure from moderates within the Republican party and changed his rules resolution at the last minute. Yet Democrats remain outraged, calling McConnell's proposal a "national disgrace." Is a fair trial possible? CNN political director David Chalian gets the latest updates on the contentious debate from CNN Politics congressional reporter Alex Rogers. Plus, CNN legal analyst Michael Zeldin explains how the rules will shape the proceedings.
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