To the majority of Americans, Moore represents the radical left wing of the Democratic Party. That is beyond debate and accepted as fact even by most Democrats.
Whether or not the Democrats adopt a radical agenda as part of their platform in the upcoming elections is another matter.
Letting the political campaign become dominated by a far left agenda is fraught with peril for the Dems. Most moderate Democrats realize this and attempt to distance themselves from them, but the radical left is extremely vocal, and adopts an in-your-face style of confrontation that many middle-Americans find repugnant.
With a Congress split between a Republican controlled Senate and a Democratically controlled House, Bill Clinton adopted a leftist agenda in 1993; gun-control, gutting the military budget, gays in the military, increased taxation, and a number of others.
The gun-control bill, pushed through Congress despite warnings from members of his own party, literally blew up in his face. This and other things, broke the iron grip the Democrats had had on the House for almost fifty years.
In every election since that time, Democrats have fought desperately to rid themselves of the reputation of being dominated by their radicals.
Fair or not, that is how many middle-of-the-road Americans perceive them.
Adopting opposition to the war in Iraq may be issue that yields control of Congress to them...but they had better approach it cautiously, for if they don't watch how they handle it it could backfire on them.