George Wallace benefitted from it. So did Ralph Nader. Paul Hackett tapped into it. The anger vote rises and falls but often can be at least ten percent.
Simmering this year is anger about the war, Republican Dranconian immigration restrictions, illegal wiretapping,prescription Medicare changes,Presidential lies. The list goes on.
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The Democrats are accused of being wishy-washy. One way to avoid this is by expressing anger over one or two issues--I'm sick and tired and won't take it anymore. Such an approach could bring out the netroots and grassroots and give many people who feel frustrated opportunities to vent themselves through a candidate.
The Republican echo chamber (talk radio,FOX News, etc.)and the right wing understand the importance of electoral anger and have been encouraging it for years.
But how many on the left express anger? Wellstone did. Feingold does. Kennedy sometimes. Why don't others?
If candidates don't express passion, often expressed through anger, why should voters care?