0zer0 won by 52%. That is NOT a landslide.
If Palin hadn’t been the VP candidate, then we’d have seen a landslide.
It was 45.7% to 53%.
Reagan won with only 50.7% in 1980, and it was still a landlside.
Because Carter only got 41%.
When McCain-Palin lost every single state they possibly could have, and a couple more that no one expected like Indiana North Carolina, and part of Nebraska, it is a landslide.
When McCain-Palin lost by more electoral votes than they carried, it is a landslide.