That was long before Presidential candidates had any say regarding who would be their running mates. Also, in that election, Calhoun was the only candidate for Vice President.
Yes, the selection of VPs was quite different than today.
What I was getting at is the effect that Calhoun’s championing of nullification must have had on Jackson while he was preparing to invade South Carolina.
Jackson was probably the most hot tempered man ever to be President. He had led a violent life, something Calhoun surely knew. You have to admire Calhoun’s sheer audacity, crossing Jackson was akin to prodding a tiger with a stick.