Alberta UCP caucus has ‘no business’ signing separation vote petition: former premier  CTV NewsFormer PM Harper says he did not sign Alberta separation petition in sit-down chat with Chretien  CTV NewsAlberta UCP caucus has ‘no business’ signing separation vote petition: former premier  CBCFormer prime ministers Harper, Chrétien call for national unity to confront Donald Trump  The Globe and MailHarper and Chretien talk Alberta separatism, Canadian sovereignty in Ottawa  Global News