Wall Street investors, economists, and likely the White House will watch closely as the new Fed chairman holds his first news conference.

The Federal Reserve's June meeting will mark Kevin Warsh's first as chair. He may need to deliver what is likely to be unwelcome news to the president.

WASHINGTON, June 15 : New Federal Reserve Chairman Kevin Warsh has talked at length in recent years about the U.S. central bank's balance sheet, the need to say less about…