By Utkarsh Hathi Jan 30 (Reuters) - Canada's main stock index tumbled over 2% on Friday, hammered by plunging mining shares, as gold slumped after U.S. President Donald Trump nominated Kevin Warsh - often viewed as hawkish - as the new Federal Reserve chair.

US stocks fell as traders digested Donald Trump’s decision to nominate Kevin Warsh as Federal Reserve chair.

“There’s a combination of investor concerns around the Fed chair announcement, some mixed tech earnings and lingering inflation pressure as well as some uncertainty about a potential government shutdo...