Which preposition to use with colonizationist

in Occurrences 1%

This would put the colonizationists in the position of increasing the intelligent element of the colored population, which was then regarded as a menace to slavery.

of Occurrences 1%

"In the evening a colonizationist of this city came to introduce an abolitionist to Lewis Tappan.

Which preposition to use with  colonizationist