It hasn't been impossible, it just hasn't happened. It is not like Ohio has been the key swing state in every election since 1960. I swear, Ohians are so dramatic about the "So goes Ohio," thing.
This election: Romney takes Ohio and Florida....Obama wins Virginia, Colorado and New Hampshire or Iowa, Obama wins the election. Conversely, if Romney wins Colorado, Virginia and Iowa or New Hampshire, Romney wins the election (as Chuck Todd pointed out on Meet the Press this morning, it is a real possibility according to recent polls). Ohio's relevance in this election is shrinking by the day. The path to electoral victory this time around is going through Virginia, New Hampshire and Colorado. Not Ohio and Florida like the past three.