The Supreme Court has backed a multibillion-dollar oil railroad expansion in Utah in a ruling that scales back a key environmental law and could speed development projects around the country.

The Supreme Court unanimously decided Thursday to limit environmental reviews for major infrastructure projects in a case that has profound implications for President Trump's "energy dominance" agenda.

The high court just weakened the National Environmental Policy Act, in a win for Trump and Big Oil. One lawyer says it’s “the worst possible outcome”