CA Democrats Worry They Won't Regain A Supermajority

From Breitbart California:

Walters points out that the Democratic supermajority had trouble implementing their leftist agenda because of moderate Democrats who balked at the plan. He adds that other races, including former Assemblyman Raul Bocanegra’s effort to win a rematch with Assemblywoman Patty Lopez and outgoing Assembly Speaker Toni Atkins’ battle with Sen. Marty Block in San Diego, may throw a wrench into the Democrats’ plans.

And this is a problem how?