What proposed law in the mid-1800s would have banned slavery in territory taken from mexico?

When a nation depletes its natural resources, it often experiences rapid decline because it:

:) during the cold war, people were afraid of communists, both outside and inside the united states. the red scare and mccarthyism that grew out of these fears were damaging to the american way of life. during the mccarthy years, many of the freedoms guaranteed in the bill of rights were limited. write a paragraph explaining what lessons can be learned from the mccarthy era about what u.s. citizens need to protect in order to preserve the democratic political system and the american way of life.

What area is it likely to have the most population