Between launching four astronauts and 54 satellites into orbit, unveiling an electric freight truck and closing in on taking over Twitter this month, Elon Musk made time to offer unsolicited peace plans for Taiwan and Ukraine, antagonizing those countries' leaders and irking Washington, too.

Musk, the richest man in the world, then irritated some Pentagon officials by announcing he didn't want to keep paying for his private satellite service in Ukraine, before later walking back the threat.

As Musk, 51, inserts himself into volatile geopolitical issues, many Washington policymakers worry from the sidelines as he bypasses them.

A two-decade partnership between Musk and the federal government helped the United States return to global dominance in space and shift to electric cars, and made the tech geek an internationally famous CEO. But many in Washington, even as they praise his work in areas of national security, now see Musk as too powerful and too reckless.