President Donald Trump has called out the Federal Reserve in recent weeks, urging the central bank to continue cutting interest rates. But Chair Jerome Powell said Wednesday that he hasn’t had any contact with the president and declined to comment on any of Trump’s remarks.

Federal Reserve Chair Jerome Powell said Wednesday he has not spoken to President Donald Trump since last week's remarks by the president when he said he would demand the central bank lower interest rates.

A fight is brewing between President Trump and Fed Chief Jerome Powell over the Federal Reserve’s unwillingness to aggressively cut interest rates. CNN’s Matt Egan talks to AGF Investment’s Greg Valliere about why the tension could begin to unnerve the markets.