NASA and SpaceX plan to hold an event on the launch of a manned rocket on March 12.
Jared Isakman, Mr. Trump's NASA appointee, said future Polaris missions by him and Mr. Musk's SpaceX "remain a question mark and may be on hold for a while".
NASA and SpaceX plan to complete the separation from the space station on or after 9:05 PM Eastern Time on October 22.