What did the southerners threaten to do after California applied for statehood as a non-slave state?

In duncan v. louisiana, the supreme court ruled that the [blank](fourth, fifth, sixth) amendment could be incorporated to the states. the [blank](equal protection, due process, enforcement) clause of the fourteenth amendment allowed incorporation to take place in this case.

Match each model with its name and the name of the scientist who created it.

List two reason that james k.polk gives for supporting the annexation of texas