The U.S. Department of Justice said on Friday it has sued California in a bid to end the state's enforcement of emissions standards for trucks. The DOJ said it filed two complaints this week in federa

The Justice Department is suing California in an effort to block the state's enforcement of emissions standards for trucks. Why it matters: It's the latest battle between President Trump and Democratic Gov.

The Justice Department asked to join the fray in a recent lawsuit launched by trucking manufacturers alleging California is attempting to enforce its unlawful emissions standards.