Conversation so far:
Who was the Boss of Jersey City for Frank Hague?
After taking office as mayor, Frank Hague wrested control of the Hudson County Democratic Party, allowing him significant influence. He built the organization into a powerful political machines.
When did Hague become Boss of Jersey City?
May 11, 1917, Frank Hague was chosen as the new mayor.
Are there any other interesting aspects about the Frank Hague article?
Frank Hague himself became very wealthy, owning a $125,000 summer home in Deal, living in a large apartment in the best building in the city.

Question: How did he change the government in the city?
Self-contained rewrite: How did Hague change the government in Jersey City?