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Ahead on the 1/21 Maddow show

Tonight's video preview and guest list.

Tonight's guests include:

Rosalind Helderman, political reporter for the Washington Post

Kendall Coffey, former U.S. attorney and NBC News legal analyst

Matt Katz, reporter for WNYC

A tune to help get you through any snow storm! And executive producer Bill Wolff, with a video preview of tonight's show: