December marks the potential beginning of the end for the impeachment inquiry. With a self-imposed deadline looming, Democrats are likely preparing to draft articles of impeachment. Yet the White House is still resistant to participation. And why won't Republicans stop talking about the debunked theory that Ukraine meddled in the 2016 election? CNN political director David Chalian looks ahead at the next few weeks in impeachment with CNN senior writer and publisher of the Impeachment Watch newsletter Zach Wolf and impeachment expert and national security analyst at The Washington Post, Shane Harris.

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