Question

according to this quote, what was the main purpose of the new republican party?
to support the new businesses of the industrial revolution
to expand the power of america in global affairs
to champion and spread liberty
we think some simple name like republican would more fitly designate those who had united to restore the union to its true mission of champion and promulgator of liberty rather than propagandist of slavery.
—newspaper publisher horace greeley 1854
promulgator: someone that promotes an idea to others
propagandist: someone who tries to spread an idea or belief

Explanation:

The quote from Horace Greeley in 1854 states that the "Republican" would be a better name for those united to restore the Union to its true mission of champion and promulgator of liberty (not slavery). So the main purpose of the new Republican Party, based on this quote, is to champion and spread liberty. The other options: supporting new businesses of the Industrial Revolution is not mentioned, expanding America's global power is not related, but the quote emphasizes liberty.

Answer:

to champion and spread liberty