The sentence did not say that every Republican who has won Ohio has won the presidency. It said that no Republican has won the presidency without winning Ohio.
Winning Ohio is thus a “necessary, but not sufficient” part of winning the White House for a Republican according to this theory.
I’m an Ohioan, but while the ‘not without Ohio’ is true, it fails to recognize that Ohio goes with the nation in overwhelming victories and in landslides.
In CLOSE elections, Ohioans make the difference because of the electoral college route that normally takes place.
If Trump can bring in a New Jersey, a New York, a Michigan, or a Pennsylvania, then that electoral college path has been changed.
IF there’s ever been a year when that is possible, then this is that year if Trump gets the nomination.