Television viewers who have endured even a single commercial break lately could be excused for thinking the bitter contest between US Representative John F. Tierney and Republican challenger Richard Tisei revolves around a single issue: how much, if anything, Tierney knew about the illegal gambling ring run by his wife’s brothers. Neither said a word about that matter Wednesday night in their third debate -- avoiding it just as they had in the first debate.
Unlimited access to BostonGlobe.com for only 99 cents for the first 4 weeks.Sign up
Are you a home delivery subscriber?
Get FREE access as part of your print subscriptionStart Here
Contact us for help