Answer:
A.) lobbying politicians already in office
In the poem, Dunbar attacks through these identifications to the legal institution, represented by a judge, who is described wearing a black mask, also refers to the medical institution, as it describes a doctor wearing a white mask; and finally attacks the institution of the Church, because Dunbar describes a minister, with his eldest son. All this is clearly the way to expose how every part of American and white society is racist, and engage both the professionals, the high church members, as well as the representatives of the judiciary power, all involved in the horrible act of lynching a old african-american man.
The Louisiana Purchase was actually a pretty shady deal. Jefferson bought it from the french without the approval of the people. His goal was that he wanted to expand the territory of the U.S. Previously the american people wouldn't go past the mountain range for fear of foreign colonies and native Americans. This purchase also ended up opening a trade route from coast to coast. While technically Lewis and Clarke went farther than they were supposed to, there was no one that could really contest them.