I doubt that's what they were saying. It's simply that only 1/3rd of the government signed onto the treaty. That was public and well known. Any foreign power w

I doubt that's what they were saying. It's simply that only 1/3rd of the government signed onto the treaty. That was public and well known. Any foreign power would realize they couldn't rely on continuity as their only supporters was a president who couldn't hold power for longer than 8 years. If Congress had signed in, it wouldn't matter who was President afterwards. Countries like the UK, don't have this issue since they are parliamentary governments so there's really only 1 branch of government with legislative and executive power integrated. Most countries in North and South America though are presidential democracies, so the US is in good company.