- Mitt Romney has become Donald Trump's fiercest critic inside the GOP
- Romney's former top adviser says the former GOP nominee couldn't sleep if he didn't raise the alarm about the party's new leader
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)Mitt Romney "feels he's putting country over party" in his outspoken opposition to Donald Trump, his former top political adviser says.