Final answer:
The author uses rhetoric to advance the point of view that Lincoln is a welcoming man by highlighting his accessibility and approachability.
Step-by-step explanation:
The author uses rhetoric in the above sentences to advance the point of view that Lincoln is a welcoming man. By describing how the door of his private room was thrown open and how all the people who had been waiting to see him flocked in and arranged themselves on seats around the room, the author emphasizes Lincoln's accessibility and willingness to meet with and listen to the people. The mention of Lincoln sitting at a plain desk in a room that could have belonged to a merchant or a solicitor further emphasizes his down-to-earth and approachable nature.