Why where business leaders such as john d rockefeller called robber barons?

A "robber baron" was someone who employed any means necessary to enrich themselves at the expense of their competitors.

honeslty bro its the same thing

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.