Obama campaign wasn't thumping it's chest about NH prospects. Obama was trailing by some 10-20% in Dec polls for NH, and by 4.5% in January polls before IA. He ended up losing by 2%, which was a strong showing.

"the widening lead she has over the past days will expand"

Keep dreaming and spinning :)

The gap widened in your own graph after NH and NV to 20% (he was faring even worse among Feb'5 states), but it was a flat out tie on election day, 2/5/08.

"because obama once again shows on 2/5 that he can't close the deal."

He did close the deal by pulling from 20% deficits into a tie.

"he had every resource he needed to put her away, and yet voters just aren't buying it."

Clinton came in with a 25% advantage from the name recognition she has had, but as of now, all told. Obama has polled more votes (popular votes) all contested races taken together, and probably more regular people chose pledged delegates as well (as should become clear once the dust settles on delegate counting process for Feb'5 states).

Obama is overcoming the dominating Clinton name recognition and the mighty Clinton machine, rather impressively.