This statement is a severe understatment meant to further marginalize Romney. Fact is, outside of his three home states (MA, MI, and UT) he has won EIGHT other states (ME, MN, CO, AK, WY, NV, ND, and MT).
It is true that his delegate count as a result of not winning the big states is defficient when compared to McCain...and that over taking McCain will be a Mount Everest.
But to say that he has only won his home states and little else is simply not true.
It should be pointed out that McCain is ahead in the race for having won typically democrat States like New York, Delaware, California, Illinois, Connecticut and New Jersey. The delegates he picked up in those blue States, plus the 18 delegates he got in Massachusetts, represent about 57% of McCain’s delegate count to date. I do not think McCain would win any of those States in November.