For a quarter century, Sen. Dianne Feinstein (D) has built a career as an effective liberal legislator, the author of a federal assault weapons ban and a warrior for civil and gay rights who collaborated with Republicans on energy and health-care bills.
But to a generation of ambitious California Democrats intent on challenging President Trump at every turn, her record is no longer sufficiently liberal.
State Senate President Pro Tempore Kevin de León (D) has already said he will run against her, and wealthy environmentalist Tom Steyer is considering his own bid.
http://thehill.com/homenews/state-watch/355751-resistance-to-trump-fuels-new-generation-of-california-liberals