Jerry Labriola of Naugatuck doesn’t have a primary. He’s already the Republican candidate to challenge U.S. Rep. Rosa DeLauro, D-3. But Labriola does have a theory that’s counter to the nearly universal whine among politicians who are concerned that the summer depths will overshadow the August 10 primary. “The economy is so bad, no one can go on vacation,” he quipped the other day. “I expect a large turnout.”