GENUINE CHRISTIAN?

“[H]e (Obama) must have come to understand that, to succeed in politics, it would help to acquire the trappings of being a good Christian — regardless of what he may or may not have personally believed. It is generally beyond the pale to question a public figure's personal religious commitment (Democrat's, anyway) —and I don't personally care whether he is a genuine Christian (whatever that may be) or not. But, if he was there to absorb the spiritual stuff, he can't have missed the political message, since they were pretty closely intertwined.”
NRO's Lisa Schiffren makes a good point about Obama and his pastor. He “can’t have missed the political message.” However, while she confidently uses the terms “good Christian,” apparently she doesn’t know what constitutes a “genuine Christian.”
I can say with some confidence, genuine Christians are not "clinging to their guns and religion" because of low wages.

So what is a genuine Christian?
KOINONIKOS