If it was a "long primary" argument, why did she say it months earlier?

[grassfed]

She was tired and the Kennedy's were much on her mind then too? If anyone knows that Words are Weapons it is the Clintons.

Well put by another DU poster whose name I've forgotten (apologies):

"It would be a whole lot easier to accept as a mistake if the Clintons hadn't been doing thinly veiled language all spring. Always skirting the edge of two meanings. One sinister, the other innocent. They have proven that they are masters at this.

So, yes indeed, she was talking about June. And the way she did that was to remind everyone that a terrible thing happened in June 1968.
This from the most politically astute team in American politics? An accidental slip of the tongue? I just don't think so."