The public comment period for KeyCorp’s acquisition of First Niagara has been extended until Jan. 31. The announcement comes just a few days after Sen. Chuck Schumer called on the Federal Reserve to extend the period past its Dec. 31 deadline. Cleveland-based KeyCorp (NYSE: KEY) announced it was acquiring Buffalo, New York-based First Niagara (NASDAQ: FNFG) for $4.1 billion in October. The acquisition is likely to lead to branch closings and job cuts in Albany and other upstate New York markets. Comments…