Trump banned part of the White House press pool. Here's what that means.

Television networks have suspended the presidential press pool after President Trump banned CNN, MS NOW and Politico from covering the White House. Now, the outlets are suing the administration to restore access. Mr. Trump says the White House is not attacking the free press, but networks argue its actions are unconstitutional on First Amendment grounds. CBS News' Weijia Jiang breaks down the role of the TV press pool.