What factors let to a growing american work force between 1860 and 1900

In his speech how does kennedy build his claim that the united states will defend freedom in its hour of maximum emergency? a. by arguing that the u. s. must enforce international law across the world since the united states is the lone superpower in the worldb. by demonstrating that the poverty which many people suffer from is an obstacle to true freedom  c. by stating that the u. s. will play an active role in fighting groups that are opposed to freedom, and by supporting groups that are fighting for freedom  d. by demanding that the adversaries of the united states be more willing to negotiate, or else there will be war

Donald trump will plan to use his emergency powers to build the wall between the us and mexico, instead of shutting down the government again?

What does the second video tell you about life in the united states compared to life in russia?