How did South Carolina's response to the 1832 tariff foreshadow secessionist sentiments?

In the 1830s,
South Carolina responded to the
tariff in two ways.  First, they asserted that they (and other
states) had
the right to nullify laws made by the national government.  Second, they
threatened
to secede from the Union.  Both of these foreshadowed what they
would do in 1860.

By saying that states had the right to
nullify federal laws, South Carolina was
essentially saying that the states
were sovereign.  They were saying that states could pick and
choose which
federal laws they would obey.   This really is the next thing to saying that
the
states can withdraw from the Union whenever they wish.  In additon, South
Carolina threatened to
withdraw from the Union if the federal government
tried to collect the tariff by force.  This is
much more explicitly a
movement towards secession.

Overall, South Carolina's

actions in the tariff/nullification controversy foreshadowed what it would do in 1860
because it
was asserting the idea that it was a sovereign state that could
choose to obey or disobey the
national government as it wished.