“One of Bain’s earliest and most notable venture investments was in Staples, Inc., the office supply retailer. The funding enabled Staples to expand from one store in 1986 to over 2000 stores in 2011.”
https://secure.wikimedia.org/wikipedia/en/wiki/Bain_Capital
In politics, if you do not define yourself, then you will be defined.
Romney has made the claim of having created 100,000 jobs. Without him defining what that means, as you can see, there are various ways as to how his political opponents can claim that he went about that without outright denying he actually did that.
If he isn’t prepared to defend his record, his opponents will use his record against him.