Getting back to this debate, I decided to run the numbers for the entire shortlist using rg’s metric: by popular vote, compare the last election result before the leader took over to the election in which that leader peaked. So, for instance, for Jack Layton I compared the NDP’s 2011 result to the NDP’s result in 2000.
Using that measure, our seven leaders (including Mr. Layton) post the following gains by percentage point.
Danny Williams 29.0
Gordon Campbell 24.4
Jack Layton 22.1
Dalton McGuinty 15.3
Gary Doer 8.0
Stephen Harper 1.9*
Jean Charest 1.5
Add those numbers to our previous stats as you see fit.
*That compares 2011 to the combined result of the Canadian Alliance and Progressive Conservatives in 2000.