Well, you said not voting for Romney equals a vote for Obama. A zero in column A just doesn’t equal a +1 in column B.
If there are 2 voters..One Dem (A) One Rep (B)
Dem votes ...... (A)= 1
Rep does not vote (B)= 0
I didn’t say A = B I said it might as well be a vote for Obama. and by my math 1 is more than 0
hence, Obama gets ONE Romney gets ZERO.