Which three presidents (1850 to 1860)considered to be among the worst in american history?

Fillmore, Buchanan, and Pierce.

The three presidents (1850 to 1860)considered to be among the worst in American history are Fillmore, Buchanan, and Pierce.The three Presidents who led  the Civil War were Northern-born. Although they are from the North, they had Southern sympathies toward slavery.

Blue ridge is the correct answer.