Bernstein's answer:

Triangulation is an advertising slogan coined by Dick Morris to advertise himself -- to give him as large a share of the credit for Bill Clinton's 1996 re-election as possible. That's all. Trying to find any deeper meaning in it is like trying to find the deeper meaning in "Coke Adds Life" or "Tiger in Your Tank." Might be interesting to do it, but it's not going to tell you much about soft drinks, gasoline, or politics.

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