It has been argued that this contributed to the support he enjoyed from crucial swing states .
During Trump 's 2016 election campaign , Trump promised to revitalize the coal industry , which he claimed has been hampered by environmental regulations .
It has been argued that this contributed to the support Trump enjoyed from crucial swing states .
During Trump 's 2016 election campaign , Trump promised to revitalize the coal industry , which he claimed has been hampered by environmental regulations .