Why did andrew johnson become president on april 14 1865

He became president when Abraham Lincoln was assassinated

Explanation:

He was vice president while Lincoln was president, and when a president is fired (yes that can happen, i.e removed from office) the vice president is then appointed president

what are the options?

- "a new era of american politics began with jackson's election in 1828, but it also completed a grand social experiment begun by the american revolution. nevertheless, jacksonian democracy represented a provocative blending of the best and worst qualities of american society."

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