Question

Why would a single-issue, anti-slavery platform be a catalyst to ushering in a new political party?

Southern planters wanted a new means of cheap labor.
People in the north were less motivated by profits from slave labor and more interested in freedoms for all people.
The Whig and Democratic parties didn't offer any solid candidates.
John C. Freemont spoke about the First Amendment rights.

Answer 1

Southern planters wanted a new means of cheap labor,

Step-by-step explanation: People in the north were less motivated by profits from slave labor and more interested in freedoms for all people.