nypost.com — Billionaire hedge-fund mogul and Republican stalwart Paul Singer is in an odd position of late - asking the Obama administration for help to keep troubled mortgage lender ResCap out of bankruptcy. Singer, whose Elliott Associates owns debt in the mortgage lender, a unit of Ally Financial, asked Treasury Secretary Tim Geithner in recent weeks to use the government's 74-percent stake in Ally to press for an alternative financial cure.