source: Calling the President of the United  States  the sluggish-minded James Monroe. # The author challenged with his article U.S. domination over Guatemala.
target: Calling the President of the United  States  the sluggish-minded James Monroe. And since Labeling U.S. president Monroe as sluggish minded means challenging U.S. domination over Guatemala. The author challenged with his article U.S. domination over Guatemala.