It was a landslide. It is supported by the numbers: 304 to 227.

George Washington won 100% of the Electoral College in 1789 and 1792.

Do you sincerely believe the elections of 1789 and 1792 were even remotely close to what the 2016 election was like?

The Electoral College has changed over time as have election rules and the number of voters.  Obama's victory over McCain in 2008 happened before SuperPacs were allowed. If McCain had SuperPACs maybe he would gotten more votes and Obama would have won by a lot less. In other words, the rules of the election in 2008 were completely different than in 2016, so its meaningless to compare the two equally.

That's why comparing Trump's victory to old elections is dubious.  It's like comparing a modern Ford Mustang to the first Ford Model T built in 1908. They're both called automobiles, but they are as different as night and day, so there is no real comparison to be made.