washington interior department inspector general say would investigate report threat agency head ryan zinke republican senator lisa murkowski state alaska last week opposition party efforts repeal obamacare zinke call murkowski alaska u.s. senator republican dan sullivan july 26 day murkowski crucial vote motion begin debate healthcare overhaul alaska dispatch news report interior secretary warn two senators murkowski vote could negative consequences energy land use alaska newspaper say murkowski spokeswoman karina peterson confirm zinke call senator interior department deal policies crucial state economy drill mine federal tribal land control wildlife areas inspector general office send letter democratic u.s. representatives frank pallone raul grijalva top democrats house committees energy natural resources respectively thursday even say would start preliminary investigation matter two lawmakers ask inspector general office government accountability office gao investigation follow report threat zinke office gao immediately respond request comment murkowski july 25 vote along republican senator susan collins maine force vice president mike pence cast tiebreaking vote pass motion 51-50 ballot subsequent efforts senate repeal affordable care act commonly know obamacare collapse last friday murkowski collins senator john mccain arizona join democratic independent senate colleagues vote skinny repeal bill would eliminate part obamacare murkowski chair senate committee energy natural resources oversee appropriations appointee confirmations zinke agency thursday interior secretary suggest reconcile murkowski post photo drink alaska-brand beers senator twitter say dinner say brew friends know well tweet interior department watchdog investigate threat alaska senator healthcare