[Jung Ji-Hoon]

Millard Fillmore

While he did admit California to the Union and was himself anti-slavery, he was against Lincoln's policies, against laws that regulated slavery in the states, and was willing to sign the Fugitive Slave Act into law, which required the return of fugitive slaves in the North to their owners in the South, if found. This was part of the "Compromise of 1850" that eventually led to the complete breakdown of the Whig party; Fillmore, who only became president on Zachary Taylor's early death, was also the last Whig to be elected to that (or, I believe, any other) office.