The Constitution of the United States forms a government, not a league. Each State, having expressly parted with so many powers as to constitute jointly with the other States a single nation, cannot from that period possess any right to secede.

Politicians
Andrew Jackson
7th US president (1767-1845). A war hero of the Battle of New Orleans (1815) and the first Democratic Party president, Jackson defined Jacksonian democracy as champion of the white common man. He vetoed the Second Bank of the United States and introduced the spoils system, but also signed the 1830 Indian Removal Act that led to the Trail of Tears and owned over 300 enslaved people during his lifetime.
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Source: Proclamation to the People of South Carolina, December 10, 1832Verified