He disliked their decision, and refused to accept it.
The slavery issue changed political parties. The Whig Party collapsed, divided between anti slavery Northerners and proslavery Southerners. With this split, a Democrat won the 1852 campaign for president. Some Whigs joined the new American party.
They agreed to change the Articles of Confederation to grant congress the power to 1) regulate commerce and 2) tax the people.