How did slavery cause conflict between mexico and the united states?

In shifting to a defense policy based upon the concept of "flexible response," president kennedy was indicating that he had grave doubts about thevalue of which previous defense policy? a massive retaliationb collective securityc containmentd air power

1.who controls fascism government? 2.who controls communism gov? 3. how do they stay in power

Which is the best description of a political campaign tactic during the ele tion of 1828