Nope.
Via The Atlantic:
John Kasich is a bit of an optical illusion. He looks like a dud—too nice to win! but maybe secretly not nice!—just so long as you squint and ignore the misty future beyond the Republican National Convention. To the nearsighted, Donald Trump owns this primary, and Ted Cruz is aiming to own the delegates; meanwhile, Kasich got Ohio, and not even all of it. Loser!
But come November, the optics reverse. Nearly every poll suggests Trump will lose catastrophically against Hillary Clinton or Bernie Sanders in the general election. Ted Cruz appears to fare better, but not better enough.
Meanwhile, Kasich somehow excels. Head-to-head polls show him soundly trouncing Clinton and holding his own against Sanders, which is no small feat. This kind of weakling-to-winner turnaround is the stuff of Charles Atlas, with Kasich cast as the shrimp who gets sand kicked in his face but ultimately transforms into the “Hero of the Beach,” or in this case, the hero of the GOP.