The DCCC's role after the primary

I see lots of speculation about what the DCCC's role is in this race. Will they get involved with their ad buys in the primary? Will they not support Harrison if he wins? Pushing these questions often is bad reporting;

The Democratic Congressional Campaign Committee has pledged more than $2 million in advertising money for the general election if McMahon beats Steve Harrison, a Bay Ridge lawyer who lost to Fossella in 2006, in the September primary.

I have yet to see an actual quote saying the DCCC will only help McMahon and not Harrison, should he win the primary. There is no source to that in the article anywhere. When you think it through I have a hard time understanding how that quote above can be true at all. The DCCC's essential mission is electing as many Democrats to Congress as possible. They rarely get involved in ideology, they just strive to have as many members of Congress voting with the party on core issues starting with choosing the Speaker of the House and going down the list from there. Should Harrison beat McMahon this September what is the logic behind thinking the DCCC would take their ball and go home? Clearly they want this seat and have shown they will do what ever it takes to flip it, so why then if the person they think is the strongest candidate gets beaten, one can assume the winner then is an even stronger candidate, they will walk away from the race? 2006 has shown us two prime examples of an activist candidate with a much smaller war chest knocking off two DCCC backed candidates and then went on to knock off the Republican incumbents, Rep. Jerry McNerney and Rep. Carol Shea-Porter. The DCCC is aware of these races and is helping both of them win their re-election. There is a track record, even if brief that shows if you are able to beat a DCCC endorsed candidate in a primary that you can go on to flip a Republican seat. So I ask if you think the DCCC would walk away from this race if Harrison won, like the Brooklyn Paper does, what evidence is there to support that and better what logic would be behind that?