[1] Maybe it's a stretch, but I think Gordon would have had a good chance of winning the leadership spot. In fact, there was speculation going all the way back to February 1967. From “Canada’s Pearson at 70 would run again if Health Persists”, Detroit News, Feb. 19, 1967: “If Pearson has given his blessing to any candidate to succeed him, he has not indicated it publicly. Possibilities include [Paul Martin, Paul Hellyer, Mitchell Sharp, Robert Waters, Allan MacEachen], and Walter Gordon, back in the cabinet after a 14-month absence. Gordon is regarded as the leader of the left-wing faction and is an outspoken advocate of economic nationalism.” In OTL, Gordon didn’t run for leader and didn’t even run for re-election in 1968: Walter Gordon: A Political Memoir, pp. 313.
[2] Similar concerns arose about Trudeau in OTL. “Canadian Premier-Designate Wealthy, Youthful ‘Swinger’”, Toledo Blade, Apr. 7, 1968.
https://news.google.com/newspapers?nid=8_tS2Vw13FcC&dat=19680407&printsec=frontpage&hl=en
[3] Some of you may know him from the totally historically accurate History Channel program Ancient Aliens:
https://www.snopes.com/fact-check/f...uminati-are-real-and-hiding-alien-technology/
[4] OTL comparison (note Winters is absent in ATL):
https://en.wikipedia.org/wiki/1968_Liberal_Party_of_Canada_leadership_election
[5] Walter Gordon and the Rise of Canadian Nationalism, pp.170
[6] As OTL.