When asked who you think will win the next presidential election, you reply that you do not know. however, after the election results are reported, yo?

I believe the answer is: hindsight bias.
hindsight bias refers to the inclination to act like you can predict the things that already happened even though you have no objective basis to predict it.
hindsight bias could be easily identified by spotting phrases such as: 'I knew he's gonna win all along!" , "i know that there is no way he'll lose with those policies that he supported!"