The Supreme Court appeared poised Tuesday to significantly weaken the scope of environmental reviews of major infrastructure projects in a case that could hand President-elect Donald Trump an early win on an issue he often hammered on during his first term.

The Supreme Court appears likely to weaken one of the nation’s bedrock environmental laws, after justices heard a key case on Tuesday. During oral arguments, several of the court’s conservative justices signaled that they could support at least some limits on the scope of which environmental impacts need to be considered in government decision-making.