Bloomberg Opinion columnist Ramesh Ponnuru argues that as much as many of Donald Trump’s critics would love to see Ohio Governor John Kasich challenge him for the presidential nomination in 2020, there are three reasons it won’t happen. Any primary challenge to Trump would merely serve the purpose of registering a protest, not to elect a new president.

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To contact the author of this story:

Ramesh Ponnuru at [email protected].

To contact the editor responsible for this story:

Michael Newman at [email protected].