Newt needs to win a simple majority, 1144, of the 2286 delegates. TX, NC, OH, AK, and GA constitutes 406. He took IA with 4 and SC with 23 for a total of 27. That makes for 433 he’ll have for all of those states which is about 38% of the total delegates needed to win.
How many other states does he have a good chance of winning at this point so far?
I forgot to include TX with 155 and OK with 43 for Newt. This brings the total up to 631 of 1144 or 55% of the needed delegates to win.