*40 POINTS*
Why might Ameicans have wanted the country to expland all the way to the Pacfic Coast?

The primary reason the U.S. expanded its influence in foreign countries: Economic reasons – industrialization in the late 1800s increased the need to trade with other countries. Manufacturers spent money constructing factories with assembly lines, but big companies often produced more products than the American people could buy. This caused companies to find places to sell their products.

Explanation:

Yes

In the late 1800s people did use wireless telegraphs to communicate, ship-to-ship communication.