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04:42 — Political strategist Alex Castellanos talks about Donald Trump's conservative credentials and also discusses Jeb Bush's downhill slide in the polls.
10:47 — Alex Castellanos, Bret Stephens and Nancy Gibbs join Morning Joe to discuss pro and anti-Donald Trump sentiment.
07:38 — Alex Castellanos and Ben Ginsberg explain why the GOP establishment is so concerned about Donald Trump and Ted Cruz.
06:06 — Political strategist Alex Castellanos writes in a new op-ed piece that Donald Trump is the presidential equivalent of the 'bad biker boyfriend.'