Climate change is the biggest governing challenge we face. It's the biggest governing challenge I think we've ever faced.
Chris HayesThe [Donald's] Trump war on the press continues. Tonight, the national cost of a conservative media bubble, now featuring alien conspiracy theories. And about those Obamacare headlines.
Chris Hayes[Marco] Rubio, in particular, focused on something far more elemental. Trump`s character and record as a businessman, and in the process perhaps added a few chapters to the Democrat`s play book against [Donald] Trump.
Chris Hayes