In what ways did regional interests assert themselves after the creation of the united states

There was tension in the politics of the nation which were largely due to differences in the economies of the North and the South. For the South, slavery was used as a labor source hence they supported slavery. The North on the other hand was opposed to slavery as it was largely urbanized.  Different regions led to the creations of different economies.

the answer is b.2008 and 2012 were presidential election years.