He's making it up.
https://dailyhive.com/canada/alberta-poll-canada-join-united-states
Perhaps he only reads right wing nutters' web sites like this one: https://simonmercieca.com/2025/05/20/bye-bye-canada-why-alberta-is-poised-to-join-the-united-states/ where it says:
BYE, BYE CANADA: WHY ALBERTA IS POISED TO JOIN THE UNITED STATES
...
As polls show significant support for exploring separation through a referendum, sceptics may argue that Canadian unity and national pride will prevail, but these are waning in Alberta. The province’s youth, increasingly drawn to American media and ideals, see their future south of the border. As economic pressures mount and political divides deepen, Alberta’s path to statehood becomes less a fantasy and more a logical endpoint. The question is not whether Alberta will join the United States, but how long it will take for the inevitable to unfold.
As is usual on such pages none of the assertions are backed by actual numbers.