The poem relies more on pathos
Pathos is the use of emotional appeals to affect the audience's feelings. Throughout the poem, "O, Captain! My Captain!" the speaker uses description to create a sad, mournful tone. The description of the dead captain with no movement or pulse helps to evoke these emotions. The speaker also uses the words "mournful" and "fearful" to capture emotions. In "The Gettysburgh Address" Lincoln uses pathos to speak about the fallen soldiers. However, the emotional appeal is greater when speaking about the death of Lincoln.