How did the attitudes toward slavery held by abolitionists, Free-Soilers, and Know-Nothings differ?

Abolitionists: They wanted slavery gone from the US forever

Know-Nothings: Like their names imply, they were usually clueless of what was going on

Free-Soilers: They didnt like slavery, but they didnt hate it as much as the abolitionists either, they just didnt want slavery to spread