If Newt is the nominee, Obama will find an excuse not to debate. Mr. Gingrich needs to show that he can win / rise in the polls on other strengths besides debating.
If Obama refuses to debate he'll be dead meat.
I have been thinking that, also. And it will be two-pronged, his reason not to debate will be an all-consuming national/international emergency requiring all his attention, aka October Surprise... Newt doesn’t necessarily need the debates, but he does need the airtime...