Four federal leaders face off in the second, and final, debate of the campaign. But after one leader was uninvited at the last minute, the commission responsible for the debates is a point of focus. We speak with the executive director of the Leaders' Debates Commission. Plus, the Power Panel dives into what's at stake for the parties in the debates. And English-language debate moderator Steve Paikin tells us what he's expecting and how he prepared.
