One paragraph from Obama’s policy that was removed, shown below, included specific goals and deadlines:
“Set far-reaching exploration milestones. By 2025, begin crewed missions beyond the moon, including sending humans to an asteroid. By the mid-2030s, send humans to orbit Mars and return them safely to Earth;”
…while the new version, despite being longer, leaves more things open to interpretation, as in the section below.
“Beginning with missions beyond low-Earth orbit, the United States will lead the return of humans to the Moon for long-term exploration and utilization, followed by human missions to Mars and other destinations;”
The Trump administration did make one significant addition: an explicit mention of commercial partnerships, a controversial issue in the space sector.