What made it seem as if america had lost its innocence in 1963?

Murder of president Kennedy.

Explanation:

It was the murder of president John Kennedy, in Dallas, Texas.

The saying exists because of the shock that the assasination caused on the population, who imagined how could someone in such a position of power could be killed in a matter of seconds.

.elections are held to determine who serves in congress.

answer:

won re-nomination with no opposition he also had the support of his party

explanation:

it saw incumbent president andrew jackson, candidate of the democratic party, defeat henry clay, candidate of the national republican party. jackson won re-nomination with no opposition, and the 1832 democratic national convention replaced vice president john c. calhoun with martin van buren.