Who championed nationalism and denounced nullification?

During 1816-1824, the US governement enacted some tariffs at a high rate. This tariffs were widely rejected by some prominent figures like Andrew Jackson, Francis Preston Blair and others.

A prominent man who defended the tariffs, which were enacted with a protectionsist purpose, was John Calhoun. The states and representatives against the tariffs claimed a Nullification over the tariffs as they considered them anti-constitutional. This was known as the Nullification Crisis.

Explanation:

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strong-mayor system