Canada also had a deal they signed with Trump. Then he changed his mind and pretended (or not) he’s to demented to remember it he and not Biden agreed to deal. Then he made other proposals then randomly changed his mind again and again.

There is nothing rational about this, he’s bullying Canada because he has much more leverage over it than he has over China and Europe. Albeit he messed up the global oil supply to fuck with both of them ( and bailed out the Russian economy from collapse while he was at it) or maybe he’s just cluelessly blundered into it, who knows)