How do caucuses work, anyway?
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Kayla Epstein explains the chaotic, confusing, bizarre process that is the Iowa caucuses. And political reporter Aaron Blake tells us how the GOP succeeded in blocking witnesses in the Senate impeachment trial.
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Kayla Epstein explains how the 2020 primaries begin, with the \\u201cgiant game of musical chairs\\u201d that is the Iowa caucuses.
Aaron Blake on Republicans blocking witnesses.
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