Article II Section 2 - The President shall have Power to fill up all Vacancies that may happen during the Recess of the Senate, by granting Commissions which shall expire at the End of their next Session.
It will be vacated upon the end of this current session. I see no evidence he is prevented from appointing the same person again at the next recess, but typically they don't do that, knowing the Senate will not confirm and to do so again will be poking a stick at congress. But then again Chairman Obamakov could give a crap less about offending congress, he offends everyone!