Several top staffers have left Rick Santorum’s campaign to create a new super PAC, a move spurred by the cash-strapped candidate’s anemic fundraising. Campaign manager Terry Allen, Iowa state coordinator Jon Jones and digital strategist Steve Hilliard — Allen’s son-in-law — departed several weeks ago, leaving the winner of the 2012 Iowa caucuses without a campaign manager and raising questions about whether Santorum can last until Iowa votes on Feb. 1 next year... The former Pennsylvania senator had among the worst fundraising hauls of the entire presidential field, raising only about $600,000 and spending about 60 percent of that in...