"It's very important for us to move forward..."
Sounds to me like the sKerry camp wishes this tape never came out.
They know that it sways the people who are softly leaning sKerry towards Bush. These people are going to vote Bush (even if they have objections to his domestic policy) over an unproven JFK who makes them nervous with his constant indecisivness.
It also may have the effect of keeping Kerry voters home.