It could be done if two thirds of the states call a convention which might actually be more likely than getting Congress to agree on anything, I'm just not confident the red states would go for it.
Electoral/constitutional politics isn't going to protect us. "International law" isn't real and neither are other laws. It's time to update threat models to include this fact. The threat-actors are definitely aware of it and using it to their advantage while relying on us to keep thinking on terms of the contrived systems they maintain.