I haven't written much about Romney's "You didn't build that" attacks on President Obama because I think they're dumb and misleading. I admit that President Obama's original speech was awkward and poorly worded. Here's the passage:

Somebody helped to create this unbelievable American system that we have that allowed you to thrive. Somebody invested in roads and bridges. If you’ve got a business, you didn’t build that. Somebody else made that happen. The Internet didn’t get invented on its own.

The "that" he's referring to is clearly the roads and bridges. It's awkward and ungrammatical, but it's obvious what he means. The Romney ads that have come out since then are disingenuous (and in fact the businessman who stars in the TV ad took millions of dollars from the federal government, proving Obama's larger point.) So now President Obama is fighting back:

The other side knows they can’t sell their ideas so what they’re going to do is try to distort my vision. Earlier today, Governor Romney was at it again — knowingly twisting my words around to suggest that I don’t value small businesses. Now, look, in politics we all tolerate a certain amount of spin. I understand these are the games that get played in political campaigns, although when folks just omit entire sentences of what you said — (laughter) — they start kind of splicing and dicing, you may have gone a little over the edge there.

He then launches into a modified Elizabeth Warren argument that we all are in this together. Read a partial transcript at Daily Kos. This collectivist argument is risky—Romney has made some hay, and some money, with "you didn't build that"—but I think what Democrats are hoping is that it comes down to the fact that we are all of us taught as toddlers that sharing is the right thing to do and being greedy is bad and wrong. If they control the framing of this issue, they can win elections by making Republicans look like the greedy kid at nursery school who gets put in the corner. This is primal stuff the campaigns are messing with, and if it backfires, it can get messy. Every word has to be in exactly the right place. Hopefully, President Obama and his speechwriters have learned their lesson.