Which issue inspired John C. Calhoun to become an early leader of the Whig Party?

Martin Van Buren's victory over several Whig candidates during the Election of 1836

the economic crisis brought on the Panic of 1837

John Tyler's expulsion from the Whig Party after he succeeded William Henry Harrison was president

the political turmoil brought on by the Nullification Crisis

The political turmoil brought on by the Nullification Crisis inspired John C. Calhoun to become an early leader of the Whig Party

Explanation:

John Caldwell Calhoun was a politician who is known to also be a theorist in politics. An American statesman from South Carolina who was instrumental and active in the running of the government in the 1820s

As a leading figure and among the proponents who champion the Nullification rights, Calhoun statesman activities in putting the government to check also include the states' rights and the opposition to the high tariff.

Calhoun being a leader at early stage with the Whig Party was as a result of his resolve in seeing to light the Nullification act against the federal tariff hike being rejected by the South Carolina and because his views tally with the Whig Party, He became an early leader even though he did not participate fully with them.