Increases in presidential popularity are often the result of :

a) midterm elections.

b) economic crises.

c) scandals.

d) international crises.

e) the actions of the vice president.

Predict how the transcontinental railroad will make a difference in the civil war. now, research the inventions of the 19th century. tell what other inventions of the 19th century will change the way people see and remember the war? why?