What was the major campaign issue in the election of 1928?

A major reason for Herbert Hoover’s landslide victory in the 1928 election was the prosperity of the 1920's. In the early 1920's there was a large economic boom and Herbert Hoover pledged to continue that. 

That the political parties were overpowering the others

question is unclear.

i can't sorry.

post the full question so i can .

i believe the answer is a