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Rubio continues support for Trump
Sen. Marco Rubio is one of the prominent Republicans in an endangered seat who has held his support for Donald Trump. Congressman Patrick Murphy, Rubio's Democratic challenger for the Senate, joins Steve Kornacki.
Battle for House and Senate
Battle in Bayou03:22
How will 2014 impact 2016?07:23
New voter ID laws could spread02:57
Priebus: People are angry, US in a ditch04:03
Ground game instrumental in voting08:33
Races to watch in Ky., NC, Texas and Colo.04:52