Rubuta ci gaba ga wannan sakin layi - A watan Nuwamba 2007, yakin neman zaben shugaban kasa na Obama
ya fitar da wata takardar manufa ta jinkirta shirin NASA na Constellation da shekaru biyar don tallafawa shirye-shiryen ilimi. Akwai damuwa cewa duk wani jinkiri zai tsawaita rata bayan ritaya na Space Shuttle, lokacin da Amurka za ta dogara ne akan gwamnatin Rasha don samun damar zuwa Tashar Sararin Samaniya ta Duniya. Sauran 'yan takarar shugaban kasa, ciki har da Hillary Clinton, ba su goyi bayan jinkirta ba.