washington republican lawmakers launch next round fight federal regulation wednesday help least one democrat u.s. senate begin work legislation change nearly every step agencies take create apply new rule republicans say deem lighten federal regulation consider costly burdensome much priority overhaul healthcare rewrite tax code president donald trump first 100 days republican-led congress attack regulation pass resolutions wipe former democratic president barack obama rule book congressional review act trump also order agencies scrap two exist rule every time enact new one trump january inauguration house representatives pass regulatory accountability act combine half dozen bill radically change government regulation wednesday senator rob portman ohio republican senator heidi heitkamp north dakota democrat introduce version act chamber pass bill combine house version trump sign law bill would bring outdated federal regulatory process 21st century require agencies use best scientific economic data available strengthen check balance give public voice process portman say statement require strict cost-benefit analysis use best available science craft rule review regulations accord summary bill diverge house version know chevron deference base supreme court rule court defer agencies interpretations statutes govern rulemaking house legislation eliminate chevron deference senate one create judicial review process court decide agencies comply law remand non-compliant rule agencies court would also review factual determinations use draft rule cost billion annually environmental labor group say senate bill could block need new regulations weaken exist ones bill would tilt scale favor polluters public expense say scott slesinger legislative director natural resources defense council would make virtually impossible safeguard public dirty air unsafe drink water health threats republicans take next step u.s. deregulation senate bill