Canada is not recoverable, we are lost because the Liberal Party has destroyed us. Alberta is the only Province that pays into the pool, everyone else drains Alberta's money away.
Greenland is severely restricted by Denmark's laws. They had to fight to get some modern airports! They generally aren't allowed to mine or drill, everything is limited by Copenhagen's Green Agenda.

Greenland doesn't "need to" join the USA, but breaking away from Denmark would help them a lot. China is waiting though :/