Optimism fades as Senate Democrats dig in, hold out over Obamacare demands

Any optimism either side of the aisle had that the government shutdown could end this week appeared to fade on Capitol Hill, as Senate Democrats appear ready to hold out longer for a deal on expiring Obamacare subsidies.Senate Democrats left another long closed-door caucus lunch on Thursday, signaling a unified front as the shutdown entered its 37th day amid Republican demands to make a deal to reopen the government.Senate Minority Leader Chuck Schumer, D-N.Y., and his caucus are still riding high after a successful Election Day Tuesday that saw Democratic candidates pummel their Republican op