Answer:
For the congress to propose amendments, it needs the support of two-thirds of the House of Representatives and two-thirds of the Senate. There are 100 senators, thus, at least 66 senators have to support the amendment, and there are 435 voting members of the house of representatives, thus, at least 290 representatives have to support the amendment for it to pass.
The United States, Canada, and Mexico...it is kind of hard to give any info, but they are all in the same hemisphere, and since they are near each other, trade is much easier than trading with other countries.
A clause for enslaved people like slaves in germany
In my country man, at least they work