Burr quickly became a key player in New York politics, largely to the power of the Tammany Society (which became Tammany Hall).
Burr converted it from a social club into a political machine to help Jefferson reach the presidency, particularly in crowded New York City.

In September 1799, Burr fought a duel with John Barker Church, whose wife Angelica was the sister of Alexander Hamilton's wife Elizabeth.
Church had accused Burr of taking a bribe from the Holland Company in exchange for his political influence.
Burr and Church fired at each other and missed, and afterward, Church acknowledged that he was wrong to have accused Burr without proof.
Burr accepted this as an apology, and the two men shook hands and ended the dispute.

In 1799, Burr founded the Bank of the Manhattan Company, and the enmity between him and Hamilton may have arisen from how he did so.
Before the establishment of Burr's bank, the Federalists held a monopoly on banking interests in New York via the federal government's Bank of the United States and Hamilton's Bank of New York.
These banks financed operations of significant business interests owned by aristocratic members of the city.
Hamilton had prevented the formation of rival banks in the city.
Small businessmen relied on tontines to buy property and establish a voting voice (at this time, voting was based upon property rights).
Burr solicited support from Hamilton and other Federalists under the guise that he was establishing a badly needed water company for Manhattan.
He secretly changed the application for a state charter at the last minute to include the ability to invest surplus funds in any cause that did not violate state law, and dropped any pretense of founding a water company once he had gained approval.
Hamilton and other supporters believed that he had acted dishonorably in deceiving them.
Meanwhile, construction was delayed on a safe water system for Manhattan, and writer Ron Chernow suggests that the delay may have contributed to deaths during a subsequent malaria epidemic.

Burr's Manhattan Company was more than a bank; it was a tool to promote Democratic-Republican power and influence, and its loans were directed to partisans.
By extending credit to small businessmen, who then obtained enough property to gain the franchise,, the bank was able to increase the party's electorate.
Federalist bankers in New York responded by trying to organize a credit boycott of Democratic-Republican businessmen.
Burr quickly became a key player in New York politics, largely to the power of the Tammany Society (which became Tammany Hall). Burr converted it from a social club into a political machine to help Jefferson reach the presidency, particularly in crowded New York City.
In September 1799, Burr fought a duel with John Barker Church, whose wife Angelica was the sister of Alexander Hamilton's wife Elizabeth. Church had accused Burr of taking a bribe from the Holland Company in exchange for his political influence. Burr and Church fired at each other and missed, and afterward, Church acknowledged that he was wrong to have accused Burr without proof. Burr accepted this as an apology, and the two men shook hands and ended the dispute.
In 1799, Burr founded the Bank of the Manhattan Company, and the enmity between him and Hamilton may have arisen from how he did so. Before the establishment of Burr's bank, the Federalists held a monopoly on banking interests in New York via the federal government's Bank of the United States and Hamilton's Bank of New York. These banks financed operations of significant business interests owned by aristocratic members of the city. Hamilton had prevented the formation of rival banks in the city. Small businessmen relied on tontines to buy property and establish a voting voice (at this time, voting was based upon property rights). Burr solicited support from Hamilton and other Federalists under the guise that he was establishing a badly needed water company for Manhattan. He secretly changed the application for a state charter at the last minute to include the ability to invest surplus funds in any cause that did not violate state law, and dropped any pretense of founding a water company once he had gained approval. Hamilton and other supporters believed that he had acted dishonorably in deceiving them. Meanwhile, construction was delayed on a safe water system for Manhattan, and writer Ron Chernow suggests that the delay may have contributed to deaths during a subsequent malaria epidemic.
Burr's Manhattan Company was more than a bank; it was a tool to promote Democratic-Republican power and influence, and its loans were directed to partisans. By extending credit to small businessmen, who then obtained enough property to gain the franchise,, the bank was able to increase the party's electorate. Federalist bankers in New York responded by trying to organize a credit boycott of Democratic-Republican businessmen.
Aaron Burr