The New York Times:
Michael R. Bloomberg has instructed advisers to draw up plans for a potential independent campaign in this year’s presidential race. His advisers and associates said he was galled by Donald J. Trump’s dominance of the Republican field, and troubled by Hillary Clinton’s stumbles and the rise of Senator Bernie Sanders of Vermont on the Democratic side.
There is no way that this does not hurt Hillary more than the GOP nominee.
If I were the DNC I would make any deal I could to keep Bloomberg out of this race.