Legislation meant to segregate blacks and whites in a legal way.
As the US supreme court asked that as long as the blacks and white had equal fundings and that all conditions were the same, segregation can be seen as legal. However, this rarely happened, and it led to desegregation by force at the end. The Jim Crow Laws was the birth of this ruling, as it imposed "equal" but segregated laws (such as segregated laws for public transport, bathrooms, resteraunts, etc.) in much of the states.
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Answer: According to Article I of the Constitution, the legislative branch (the U.S. Congress) has the primary power to make the country's laws. This legislative power is divided further into the two chambers, or houses, of Congress: the House of Representatives and the Senate.
Article one: L(egislative)
Article two: E(xutive)
Article three: J(uditial)
Hope this helps and I understood the question