The sinking of the Lusitania brought America into war.
Answer:
great success due to his ability to use his personal charisma to appeal directly to the American people in support of his legislative program
Explanation:
During the J.F Kennedy as the Presidemt of the United States between the year 1961 to 1963 before his assassination, he pursued New Frontier domestic policy, in which he experienced "great success due to his ability to use his personal charisma to appeal directly to the American people in support of his legislative program"
This is evident in the fact that President J.F. Kennedy was widely accepted and loved for his personality by the Americans
the columbian exchange introduced the Europeans and people in the Americas new types of crops, such as potatoes, sweet potatoes and cassava
C. Andrew Jackson, also if I'm correct, Martin Van Buren was also part of it.
It was that "Flat land with poor drainage led to salinization from irrigation waters," that was a factor in the decline of Sumer, since this led to a build up of salt in the soil, which greatly reduced agricultural output.
