What best explains how the supremacy clause is connected to federalism

in 1859, brown and 21 of his followers attacked and occupied the federal arsenal in harper's ferry. their goal was to capture supplies and use them to arm a slave rebellion. brown was captured during the raid and later hanged, but not before becoming an anti-slavery icon. abolitionist and insurrectionist

explanation:

besides the fact that abraham lincoln abolished slavery, and greatly benefit black people, he had a heavy impact of the definition of what democracy was, and should be.