Rasmussen was not the most accurate in the last Presidential election.
Obama won by a 7.2 margin, 52.9 to 45.7 percent.
Rasmussen underestimated Obama with a 6-point margin, 52/46.
CNN & Ipsos were more accurate with a 7-point margin, 53/46.
Rasmussen was the most consistently accurate. Other polls went back and forth with wild swings often to double digit leads for Obama. Ras has it pegged as a 4 to 6 point race pretty much from mid September onwards.