ATLANTA (AP) — Rick Perry's loss has been Herman Cain's gain.As the Texas governor has tumbled in polls for the Republican race for president, Cain has enjoyed a surge in support from a restless Republican electorate.The former pizza magnate and radio talk show host has topped a slew of recent tests of conservative activists, including an upset in the battleground state of Florida. His fundraising has apparently picked up and his poll numbers are climbing, too.A new CBS survey had the Atlanta businessman in a statistical tie for the lead with former Massachusetts Gov. Mitt Romney. His just-released, rags-to-riches political memoir has landed in's top 10 best-sellers.Cain is seeking to capitalize on the momentum and build his name recognition.