How did the great compromise deal with the creation of the legislative branch?
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It created two legislative bodies in Congress.

The Great Comprimise, proposed by Roger Sherman, combined the two proposed plans for the United States constitution. He took the idea of government regulation of interstate trade from the New Jersey Plan (proposed by William Paterson) and took the ideas of checks and balances along with a bicameral legislature from the Virginia Plan (proposed by James Madison). So to answer your question, the Great Compromise created a bicameral legislature.