The Voting Rights act of 1965 declared that no new election laws could be enacted in any state without approval from the Department of Justice. In place of approval it can also be said that without prior clearance from the Department of Justice, it is not possible for any person in the United States of America to hold elections.
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They worked for the people who had slave owners or they were slaves themselves
Trade helped empires gain money, troops, slaves, food and relations with other empires
The US purchased the Florida Territory from Spain... i think that was in 1819
He used this to keep the communists away because they were weaker than us and could not afford to be attacked; we could.