Silver only gave Romney a 9% chance on election day. The state math didn't work, that was partly why the Romney people were shocked, they hadn't done the EV math scenarios off a newer map they assumed the 2004 map was the baseline for some reason IIRC, when in reality they needed to nearly run the table on swing states like Trump wound up doing. (And the GOP did for the Senate and Governors in 2014.)
edit: Romney would have just squeaked past with 272 EV's if he won the 2004 W. states. But he lost all four of Ohio, Virginia, Florida and Iowa. (Trump won all but Virginia.)