I mean everyone said he had a snowball’s chance in hell and then we ended up with him for two terms because the Democrats can’t stop fighting over the worse possible candidates to back that no one is asking for.

When pressed before the election, Silver did not explain where Trump's much higher probability of winning came from. He predicted a Trump loss, Trump won, and he claimed victory because he gave Trump a better chance of winning. There's no way that strategy could have failed.