Xavier Becerra

The letter comes one week after the EPA announced that it would not enforce a 2016 regulation that limits the manufacture of diesel freight trucks refurbished with older engines.

• By Rebecca Worby

But analysts anticipate the war between Sacramento and Washington will go to the Supreme Court.

• By Massoud Hayoun

In the fight over immigration policy, the state and its municipal opponents are gearing up for a series of legal battles.

• By Massoud Hayoun