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 and that the Fed "has a lot to answer for" on renovation cost overruns at its Washington headquarters.

President Trump and his allies have accused the Federal Reserve chair, Jerome Powell, of misleading Congress in what some legal scholars worry is a prelude to seeking his removal.

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