How did james monroe and robert livingston affect jefferson's presidency? they ended the attacks of the barbury pirates. they arranged the purchase of the louisiana territory. both explored the louisiana territory.

The answer is that they arranged the purchase of the Louisiana Territory. The Americans thought that Napoleon might withdraw the offer at any time, preventing the United States from acquiring New Orleans, so they agreed and signed the Louisiana Purchase Treaty on April 30, 1803. Through this deal, it doubled the size of the United States