The federalists gained enough votes to get the constitution ratified when they promised this: james madison to be the first president a bill of rights to be quickly added to the constitution a supreme court with the right of judicial review the right of states to disobey any national law they didn't like a banning of the slave trade after 1808

A bill of rights to be added to the constitution.

After the many discussions regarding the ratification of the U.S. constitution in 1787-88, the Bill of Rights was developed as a way to address the objections raised by Anti-Federalists. The Bill of Rights amendments guarantee personal freedoms and rights, limit the government’s power in judicial procedures and declares that powers not specifically delegated to Congress are reserved for the states or the people, among other things.

The amendments (nine of them) were originally introduced to the Constitution in the House of Representatives by Representative James Madison. Seven of these would become part of the Bill of Rights. Afterwards, on 1789, Congress approved twelve articles of amendment to the Constitution and submitted them to the states for ratification. These appeased the Anti-Federalist fears of personal oppression by Congress.

i think they came to washington to protest