Major legal brawl may decide what types of cars Americans can buy

Blue states are bracing for a battle with the Trump administration over their authority to limit tailpipe emissions, a showdown that will have major repercussions on the types of cars and trucks sold to American drivers.

All sides expect President-elect Donald Trump to try to revoke states’ authority to adopt California’s strict rules on the pollution spewed by vehicles.

Many states’ efforts to fight climate change hinge on a federal process that allows them to adopt stringent regulations for transportation...