I believe (if I am correct) the White House did not say specifically that they were flushing the Swift Boats group, but the CBS and other liberal mass media outlets spun it that way.
Yep. Go to "Press Gaggle by Scott McClellan (White House Response to Swift Boat group--CBS LIED AGAIN)" for details. The White House is not questioning the truth behind the SBVfT ad, but are smartly calling for an end to ALL 527 ads (e.g. moveon.org, etc.), so they're on record as being against these ads, give the SBVs a plug, and don't attack their credibility. Smart politics (even though Bush signed McCain-Feingold, thinking the SCOTUS would shoot it down, thereby helping to set this up). Scott McClellan kept bringing up the $62M of 527 ads attacking the president so far.