"Before you start with your argument that you believe I would vote for Obama because he has the same skin color as me, f- you," Dorner, who is black, reportedly wrote. "I didn't vote in this last election as my choice of candidate, John Huntsman, didn't win the primary candidacy for his party."
Dorner also goes after Mitt Romney, and specifically his son, Tagg, who said during the presidential campaign that he wanted to take a swing at President Barack Obama.
"Electoral Candidates children (Romney) state they want to punch the president in the face during debates with no formal repercussions," Dorner writes. "No one even questioned the fact that the son just made a criminal threat toward the President."
And, he adds, "Romney, stop being a sore loser."
Dorner has killed three people, including the daughter of a police chief, and has made threats to several others.