Obama's budget reshapes the U.S. space agenda, PolitiFact.com
"This change of plans clearly breaks Obama's promise to "endorse the goal of sending human missions to the Moon by 2020, as a precursor in an orderly progression to missions to more distant destinations, including Mars." But the president's budget for NASA does keep five other campaign promises. It proposes working with international allies to extend the life of the International Space Station at least through 2020; it supports access to space for private-sector companies; it supports increased investment in research and development related to space; it supports increased spending to prepare for longer space missions; and it establishes school programs to highlight space and science achievements."



I strongly disagree with their conclusion that "however the appropriations process plays out, the president has lived up to his pledges as he made them."
They say so themselves when they say "[the] change of plans clearly breaks Obama's promise to "endorse the goal of sending human missions to the Moon by 2020, as a precursor in an orderly progression to missions to more distant destinations, including Mars."
Moreover, Obama has proposed a plan with no targets for humans, which is a clear contradiction of his statement above.
This is not a campaign promise kept, it is one clearly broken and one that will likely cost Obama dear in the critical I-4 corridor of Florida when and if he runs for re-election. Given that the job losses in the area are going to be steep, with little if any prospect of them coming back, it is most unlikely he will receive support even from voters who were friendly to him.
That said, he seems to forget that as goes Florida so go elections in the quadrennial presidential sweepstakes. He has created a mess for himself there.