What was the nickname give to Pro/Northern/ Anti-Slavery groups coming into Kansas?

This period of guerrilla warfare is referred to as Bleeding Kansas because of the blood shed by pro-slavery and anti-slavery groups, lasting until the violence died down in roughly 1859. Most of the violence was relatively unorganized, small scale violence, yet it led to mass feelings of terror within the territory.

Explanation:

theodore roosevelt 26th u.s. president : i admire his energy and passion. he was a fundamentally good man, brilliantly intelligent, possessed of extraordinary will and ability, supremely self-confident, bold, egalitarian, idealistic…. , lord, can we have him back?