Trump's message to defense contractors: There might be a lot more money coming, but only if you deliver

A newly produced Lockheed Martin F-35 Lightning II Joint Strike Fighter at a hangar in Fort Worth, Texas

Orjan F. Ellingvag/Corbis via Getty Images

• Trump sent a blunt message to defense contractors this week in social media posts and an executive order.
• The Pentagon is getting tougher on slow contractors and shareholder-first actions.
• Big defense primes are under pressure as startups see a rare opening.

President Donald Trump sent jolts through the defense...