SACRAMENTO, California — With Gov. Gavin Newsom’s signature on a new law Wednesday California broke from the federal government over vaccines, becoming the latest and largest state to assert its own authority over immunizations in the face of upheaval under President Donald Trump and his Health Secretary Robert F. Kennedy, Jr.

The U.S. is becoming more diverse, with Census Bureau projections showing that by 2045 no single ethnic group will hold a majority.

After the state government’s Democratic push to get a redistricting proposal on the ballot for a special election, James Gallagher, the Republican leader of the California Assembly pitched the idea of splitting California into two states. See the map below.

The way to free the oppressed conservative folk of inland California from their supermajority oppressers, Gallagher said, is to split California into two states. His map does that vertically: A thin blue line of liberal California travels along the coast while the larger, more Republican inland areas are found to the east.

Readers respond to a guest essay about the Proposition 50 redistricting proposal in California. Also: Erasing history.

National Voter Registration Day, celebrated on a Tuesday in September, is a nonpartisan event endorsed by major election organizations including the National Association of Secretaries of State and the U.