Liberal MP Nate Erskine-Smith to resign federal seat this summer following GTA nomination loss  CTV NewsNate Erskine-Smith appeals results of Ontario Liberal nomination in Scarborough  The Globe and MailANALYSIS: The anatomy of a stunner in Scarborough Southwest  TVOToronto MP Erskine-Smith challenges provincial nomination loss after casting doubt on election  CP24Scott Stinson: An outsider again, federal MP Nate Erskine-Smith appeals loss in Ontario Liberal race  National Post