As Rep. Andy Kim and First Lady Tammy Murphy battle for coveted county endorsements in the Senate primary, a pattern is taking hold. When it’s a fair fight, Kim wins. When it’s rigged by the bosses, he loses. So far, Kim has won endorsements in five counties, starting with Monmouth, where the chairman invited him to speak and acted as a referee, encouraging delegates to vote their minds by secret ballot. Kim crushed. But Kim has lost four counties now, most recently on Thursday night in Somerset, where the county chair, Peg Schaffer, endorsed Murphy off the bat, sent out supportive letters on …