I think the single biggest mistake the Democratic Party made was when it 'abandoned' a Trumanite foreign policy.
While the collapse of the 'Evil Empire' was very much realised by Reagan and accomplished under Bush (41), didn't it represent the ultimate triumph of the Truman Doctrine?
It would seem that the US electorate in the main have favoured a 'hawkish' foreign policy, which partially explains a preference for a Republican President.
Dave
The current serious (and unrecoverable?) situation was caused by the Dem primary voters.
I strongly believe that L.Clark, for example, would have done much better.
His message on Iraq is clear and explicit.