Trump seeks to block California as global climate leader

The Trump administration on Wednesday moved to topple California as a leading voice against climate change, charging in a federal lawsuit that the state exceeded its constitutional authority by joining with a Canadian province in a program to cut climate-damaging fossil fuel emissions. In addition to adding to a long list of lawsuits pitting California and other Democratic-led states against the Trump administration over proposed federal environmental rollbacks, the new lawsuit raises constitutional questions about whether President Donald Trump's inaction on climate change amounts to an international and domestic policy that states must follow, constitutional experts say.