How did political bosses like Boss Tweed gain political power in the 1800's?

Big Business leaders in the 1800's were lucky to live during the Gilded Age, a time of industrial growth that business leaders took advantage of ( incidentally, lucrative business dealers had alot of power politically because they were in control of all the industry). They gained political power, because they controlled much of the industry, and of money. They could threaten, bribe, or persuade people to vote them into office because they were wealthy.