The effort still faces questions about funding and the risks of pursuing space-based defenses.
But the Trump vision faces legislative hurdles.
A U.S. official in recent weeks has publicly said for the first time that the process for negotiating an international code of conduct that would establish rules for behavior in outer space has failed.
The path toward finalizing a code of conduct for outer space remains unclear after delegates from 109 countries met in July to discuss the way forward.
The European Union says it is ready to begin negotiations on a final draft of its proposed space code, but several countries are still asking for more time.
China conducted “a non-destructive test of a missile designed to destroy satellites” on July 23, according to the U.S. State Department.