Would have been nice to hear this earlier than the final minutes of his presidency. I have no faith that either of his possible successors give a damn about Mars.
It was in fact part of his original campaign platform in 2008 to cut funding to Nasa to pay for a national day care program. The day care never really got off the ground, but he did succeed in cutting Nasa's budget, forcing a lot of projects to shut down.
I'm glad to hear he's had a change of heart about space, though it sounds as though he's counting on the private sector to do a lot of the work. And, of course, it means diddlysquat given that he's retiring in three months.