Brown is a longtime California libertarian, antiwar activist, and past and current Chair of the Libertarian Party of California. He intends to finish his term as LPC Chair, and will be at the upcoming 2018 LPC convention this April.
Over the past 15 years, quite a few California libertarians I've known have left the Golden State for states with lower taxes and less regulation. Brown joins the exodus.
California's loss is Texas's gain.