washington u.s. judge thursday hand victory congressional republicans challenge president barack obama signature healthcare law rule administration overstep constitutional power relate government spend u.s. district judge rosemary collyer base washington rule administration spend billions dollars federal fund provide subsidies law know obamacare private insurers without approval congress issue case bring republican-led house representatives reimbursements insurance company compensate reductions law require make customers out-of-pocket medical payments rule immediate effect law judge put decision hold pending expect appeal administration add uncertainty future obama signature domestic policy achievement ahead nov. presidential congressional elections include whether enough health insurers continue participate program insurers sustain losses obamacare business say attract enough healthy customers offset cost sick members two large players unitedhealth group humana inc already say would offer plan many market next year go lose money participate ask steve halper analyst fbr capital market share hospital operators community health systems inc fell sharply insurer stock include aetna inc plan remain least 15 obamacare market next year also decline court paper administration warn court victory house republicans would lead spike insurance premiums americans force government pay tax credit insurance policy-holders part appeal administration likely press argument house lack legal stand sue suit represent first time nation history congress permit sue executive branch disagreement interpret statute white house spokesman josh earnest tell reporters unfortunate republicans resort taxpayer-funded lawsuit re-fight political fight keep lose earnest add lose fight six years lose again conservatives mount series legal challenge affordable care act since pass congress 2010 unify republican opposition collyer appoint bench republican former president george w. bush law help bring insurance coverage millions americans previously none subsidize cost insurance tax credit addition federal government help defray consumers out-of-pocket cost house republicans argue administration action violate u.s. constitution legislative branch executive branch authorize government spend big win constitution house speaker paul ryan write twitter jonathan turley lawyer spearhead lawsuit blog post call rule resound victory congress constitutional system whole appeal court washington may receptive administration arguments part seven 11 active judge democratic-appointees include four pick obama case focus cost-sharing provision obamacare require insurers reduce deductibles co-pays insurers suppose reimburse cost federal government cost-sharing determine income policyholder mechanism reduce healthcare cost lower-income households obama administration interpret provision type federal spend need explicitly authorize congress house republicans file challenge disagree collyer rule cost-sharing provision fund permanent appropriation cover tax credit make available law judge reject administration contention appropriation view permanent alternative interpretation would lead absurd economic fiscal healthcare policy result u.s. supreme court june 2015 rule author bush-appointed chief justice john roberts reject conservative challenge could gutted obamacare uphold nationwide tax subsidies crucial law roberts also write major 2012 rule preserve obamacare republicans win obamacare legal challenge add insurer concern