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Ahead on the 9/19 Maddow show

Tonight's guests:Senator Barbara Boxer, (D) CaliforniaPatrick Murphy, (D) former U.S.

Tonight's guests:

  • Senator Barbara Boxer, (D) California
  • Patrick Murphy, (D) former U.S. Representative in Pennsylvania, Iraq war veteran

And here's executive producer Bill Wolff with a look at what's to be covered: