“A person ineligible to be elected President cannot run for the Vice Presidency.”
Norm’s not arguing for impeachment, which would make Obama ineligible. He’s arguing to try and remove Obama via the 25t Amendment (a total fantasy, but tell him that). The 25th Amendment says nothing about disqualification from office, merely removal and succession.
It remains that, having served one-and-a-half terms as President, Obama would be ineligible for the Vice Presidency (since he was ineligible to serve as President again).