WASHINGTON, July 13 (Reuters) - U.S. President Donald Trump has the authority to fire Federal Reserve Chair Jerome Powell for cause if evidence supports that, White House economic adviser Kevin Hassett said on Sunday, adding that the Fed "has a lot to answer for" on renovation cost overruns at its Washington headquarters.

The White House accuses the Fed chair of potentially "violating the law" in his renovation of the central bank's Washington, D.C., headquarters.

ABC News’ Jonathan Karl interviews White House National Economic Council Director Kevin Hassett on “This Week.”