Which of the following statements is true?

the senate acted as a mediator and was able to initiate compromise between the northern and southern states.
the first half-century of racial politics in the united states closely followed madison’s prediction of tyranny in the states unconstrained by national majorities.
the winning strategy in dealing with the south was for northerners to focus on the plight of the slaves.
the first half-century of racial politics in the united states countered madison’s prediction of tyranny in the states unconstrained by national majorities.