washington lead democratic lawmaker thursday say would ask federal officials investigate report threats interior secretary ryan zinke regard alaska energy policy retaliate opposition one state republican senators efforts repeal obamacare u.s. representative raul grijalva arizona top democrat house representatives committee natural resources say investigation necessary call zinke action unethical congressman ask government accountability office interior department inspector general investigate spokesman say alaska dispatch news thursday report zinke call senators lisa murkowski dan sullivan republicans wednesday warn murkowski vote tuesday motion begin debate healthcare overhaul could negative consequences energy land use alaska newspaper say murkowski vote force vice president mike pence cast tie-breaking vote pass motion 51-50 ballot call zinke follow phone conversation murkowski republican president donald trump tuesday describe news energy environment publication unpleasant murkowski spokeswoman karina petersen confirm zinke call senator threaten punish rival political blackmail something see kremlin grijalva say secretary zinke willingness deliver threats speak volumes ethical standards demonstrate interior policy position political grab rather base science public interest zinke office respond request comment interior department oversee 20 percent federal land include national park yosemite deal energy development public land offshore areas department deal policies crucial alaska economy oil drill control wildlife areas become cabinet member early year u.s. congressman represent montana murkowski chair senate committee energy natural resources oversee appropriations appointee confirmations interior department separately interior department watchdog group western value project file record request relate zinke call murkowski sullivan u.s. lawmaker request investigation threat alaska senators healthcare vote