If he’s smart enough to wear a helmet, he’s smart enough to know he’s wrong on this one.Mike McGinn keeps making this choice easier. The P-I points to Sunday’s mayoral debate and asks if the robo calls produced by the McGinn campaign trying to tie opponent Joe Mallahan to the NRA will actually hurt him instead.First off, nobody likes getting robocalls. Then there’s the substance. Mallahan, the T-Mobile vice president, has labored to come off as the level headed pragmatist to McGinn’s dreamy idealist. In uncertain times, Mallahan is hoping Seattle voters will opt for a pragmatist.In this and his battle to undo the deep-bore tunnel, McGinn is quickly going from dreamy to downright catatonic. Political reality and Attorney General Rob McKenna say that the gun ban, while good-intentioned, is just a costly way of getting our ass kicked in court by Second Amendment groups. Does McGinn really think the best way to win voters is to bother them at home, then remind them that he’s going to knowingly waste more money we don’t have fighting a cause we can’t win?