because they are the ones that has all the right to do stuff and that they are the strongest court
I'd say because that's where people vote and pass bills.
In the 1880s, Congress became the strongest branch of the government due to its active role in Reconstruction, oversight of economic growth, effective representation of the people, and limited challenges from the presidency and judiciary. Factors such as increased legislative responsibilities and a favorable political climate significantly contributed to this development. The combination of these elements established Congress as a powerful force in shaping national policy during this period.
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