During the last general election, a canvasser from one political party called at the south Dublin door of a friend of mine. He brought up a problem the local football club had and the canvasser considered it for a moment. “That,” she told my friend, “would be more of an issue for a councillor rather than a TD.” I thought of that moment again watching Jerry Kennelly’s important documentary – The Healy-Raes: Blood, Sweat and Tears – which goes out on RTÉ on Wednesday. Discussing his determination to get the best for Kerry, Michael Healy-Rae says at one point: “If…