But we could see a potential replay of the 1940 Convention when Wilkie got in, basically to make sure both candidates were pro Aid to Britain, and lock out the isolationists.
While a change in rules could be possible, it’s not likely. So that scenario stands about a zilch stance of happening. If someone gets to the convention with the necessary delegates, they are the man/woman. Romney doesn’t stand a chance in the primaries. Trump has converted the party from Romney to him.