Answer;
Both the south and the North.
Millard Fillmore, the lats Whig president angered both the south and the north.
Step-by-step explanation;
Millard Fillmore was an accidental president. Unlike President Taylor he supported the Compromise of 1850, but believed abolition would destroy southern economy.
He was the last Whig president.
He angered the South with support for California entry as a free state, and also he angered the north because he supported the Fugitive Slave Act and popular sovereignty.