NORWALK - Former presidential candidate and Arizona Sen. John McCain traveled across southwestern Connecticut today to campaign for Senate candidate Linda McMahon. At an event at the Norwalk Inn, McCain said McMahon's experience in the private sector is crucial for job creation and the Republican Party. The pair also stumped together in Darien. "She has negotiated on many, many occasions and she understands what it takes to bring people together to solve problems," said McCain. McMahon and Rep. Chris Murphy are in a tight race for the seat held by retiring Sen. Joe Lieberman.