PHILADELPHIA — The "dark money" era of Philadelphia politics has officially begun.
An outside spending group that has raised millions to boost mayoral candidate Jeff Brown is the first political organization to play a significant role in a Philly mayor's race with most of its money coming from undisclosed donors.
With more money behind him than all but one of his rivals in this year's crowded Democratic primary field, Brown has become a top contender. About half of that cash came from a political action committee whose backers are almost entirely unknown to the public.
