SACRAMENTO, Calif. (AP) — As the political battle to overturn California's gas tax increase intensified, the state transportation agency coordinated frequently with the public affairs firm working to block the repeal on behalf of unions, construction companies and local government groups, emails obtained by The Associated Press show. The California State Transportation Agency and Sacramento-based Bicker, Castillo & Fairbanks organized news conferences and other efforts to promote legislation to raise the tax to fund road and bridge repairs, which passed the Legislature in April 2017.