Americans were unhappy with president clinton prior to the midterm elections of 1994 because

He was involved in several White House scandals.

Explanation:

Both political and personal scandals troubled the Clinton administration during his first term. There were charges about the Clintons illegally benefiting from their participation in a failed savings and loan. The Clinton administration was linked to the cover-up of the Whitewater case and Vincent Foster killing himself. Furthermore, there were accusations of questionable commodity negotiations by Hillary Clinton and the sex scandal of Bill Clinton in Arkansas.

because mexico wanted to choose a centralized location

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.