Former Progressive Conservative Leader Peter MacKay, former Interim Liberal Leader Bob Rae, former Bloc Quebecois Leader Gilles Duceppe, Conservative Candidate Erin O'Toole, Liberal Candidate Bill Blair, Liberal Strategist Rob Silver, former Harper campaign Director Jenni Byrne, former NDP MP Nathan Cullen, Indigenous Activist Pam Palmater, CTV's Craig Oliver, The Toronto Star's Tonda MacCharles, CTV's Joyce Napier and Nik Nanos of Nanos Research.