Twelve states and the District of Columbia released a draft plan for an ambitious cap-and-trade program to curb planet-warming emissions on the region’s roads.

Aides describe the president as obsessed with narrow policies that affect California, even as an impeachment inquiry threatens his administration.

Monday’s surprise move by G.M., Toyota and other car makers to back President Trump in his fight with California over pollution rules followed calls from the White House.

Along with Toyota and Fiat Chrysler, the auto giant backed the administration in its clash with California over pollution standards.

California’s eight years of drought officially ended in March, but wildfires are still engulfing parts of the state. Here are three major contributions. 

The Kincade fire is burning more than 10,000 acres in California. Other areas of the country are experiencing drought so understanding fire is becoming ever more important. 

The Justice Department has sued California over a climate change initiative that now extends into Canada, saying the state cannot make international agreements.

The hospital group in California was accused of using its market dominance to demand higher prices for health care.