Kenneth Khachigian, who has returned to Santa Barbara to work with a law firm, has come aboard as a senior adviser for undeclared presidential hopeful Fred Thompson. Khachigian said the former Republican senator from Tennessee, who is officially testing the waters, will declare candidacy soon, but not before vital campaign infrastructure is in place. “It’ll be a few more weeks,” said Khachigian, who wrote speeches for presidents Nixon and Reagan and in June joined the Santa Barbara law firm Hatch & Parent. “It’s like launching an aircraft carrier. Every thing has to be ready or you won’t float.” Asked whether...