There were, but you have to go back to 1994.
The difference between then and now is that the parties have been “purified” ideologically, and the mediavorgs have become more partisan (and less aware of their own partisanship).
1994 caught them by surprise, too. Remember Peter Jennings on TV, shocked, saying America was throwing a temper tantrum. Even in 1984, they only gave Reagan the edge in the week or so before the election, and never, not once, predicted the wipeout landslide that it ended up being, and probably always was.
And two catalysts of that were Hillarycare and Don’t Ask Don’t Tell
Hard to imagine now