Based on the u. s. constitution, the census to determine the number of what?

Electoral votes assigned to each state

— U.S. Constitution, Amendment XIV, section 2

The Constitution provides for proportional representation in the U.S. House of Representatives and the seats in the House are apportioned based on state population according to the constitutionally mandated Census.

confederacy: supported slavery, believed states should be able to nullify federal laws, supported low tariffs

union: everything else

fill in the blank

is slave