the answer is - They forced local residents to vote for proslavery candidates.
Series of violent civil confrontation due to the debate over the legality of slavery in the proposed states of Kansas from 1854 and 1861 is known as bleeding Kansas. Electoral fraud, raids and assaults were carried out by border ruffians (Pro Slavery ) and free starters(anti slavery) in Kansas and Missouri. The main issue for the conflict was that whether Kansas would be allowed to enter the union as a slave state or a free state. The border ruffians terrorised the people who were against the slavery in the states of Kansas to change their stance. They were from the state of Missouri.
Border ruffians contributed to the "bleeding Kansas" problem by actively terrorizing citizens of the free state. The Border ruffians came from the slave state of Missouri and in an attempt to change attitudes through force, they would actively terrorize opponents to their pro-slavery stance.
The Border Ruffians contribute to the "Bleeding Kansas" problem "as they forced local residents to vote for pro slavery candidates".
The Border Ruffians were Missouri slave-state pro-slavery demonstrators. They crossed the state border from the period 1854 -1860 to Kansas Territory as to compel slavery to be recognized there. Armed Ruffians intervened with territorial elections and hitted settlements in the Free State. The term "Bleeding Kansas" originated from this violence.
Bands of armed Ruffians occupied polling places when elections were held in Kansas Territory. They prohibited people from voting for Free-State, so they cast illegal votes. Border Ruffians voted a territorial delegate pro-slavery to Congress on 29 November 1854.