Marco Rubio: We're headed toward a series of 'grave' defense policy errors

Sen. Marco Rubio, R-Fla., warned Thursday that some of President Trump’s own national security policies could be detrimental to the country after reading Defense Secretary Jim Mattis’ resignation letter to the president.

“Just read Gen. Mattis resignation letter. It makes it abundantly clear that we are headed towards a series of grave policy errors which will endanger our nation,damage our alliances & empower our adversaries,” Rubio tweeted shortly following Trump’s announcement that Mattis would be stepping down in February.