Julian Castro: Clinton emails a 'witch hunt'

Julian Castro labeled the House Republican-led investigation into Hillary Clinton's emails a "witch hunt" and a "sideshow" from dealing with America's most pressing problems.

The Housing and Urban Development secretary accused GOP Rep. Trey Gowdy of "very intentionally trying to manipulate this witch hunt to play politics."

"That's unfortunate and it's one of the reasons Congress has a 19% approval rating," Castro told CNN's Jim Acosta Sunday on "State of the Union."