- Mike Murphy says if Trump comes close to 1,237 delegates, he'll win the Republican nomination
- But a longer convention could benefit Cruz, says the campaign veteran
The Axe Files, featuring David Axelrod, is a podcast distributed by CNN and produced at the University of Chicago Institute of Politics. The author works at the institute.
Chicago (CNN)Republican front-runner Donald Trump will need to secure the required 1,237 delegates by the end of the primary season -- or come very close -- if he is to keep the party's nomination from slipping away, predicts GOP strategist Mike Murphy.