There’s a couple reasons why it’s ok to be obsessed with American politics:
1 - They’re still the most powerful nation on Earth. Their actions will have a strong effect on others. Especially if they’re a neighbour. Canadian politics have gotten dumber over the years in part due to American influence.
2 - American politics are a lot funnier. Cartoonishly stupid people get regularly elected to office in the US and it’s been happening long before Trump was elected.