How is a republic different from a monarchy

Republic is a form of government in which the people or their elected representatives possess the supreme power. ... The major difference between a republic and a monarchy is the fact that a monarchy is ruled by a monarch, i.e. a king or a queen, whereas in a republic, the people choose who they want to rule them

Override

Explanation:

Because Congress had so many members that were Radical Republicans they were able to Override President Johnson's vetoes.

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