Former Republican House Speaker Newt Gingrich is a frequent critic of Robert Mueller's Russia investigation. In his new book, "Trump's America: The Truth About Our Nation's Great Comeback," he writes: "This is rapidly becoming an open-ended hunt for guilt, with no regard for the limits of the law." Gingrich joins "CBS This Morning" to discuss why he would counsel President Trump to be "extraordinarily" cautious about an interview with Mueller's team, latest accusations of witness tampering against Paul Manafort, and why he says Mr. Trump stretches the truth with his penchant for storytelling.
