Only a few dozen protestors were on hand during the first hour of the protest.
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They are spending Thursday night with Massachusetts Gov. Deval Patrick and his wife, Diane.
"We need to demilitarize this situation," the Missouri senator said of Ferguson.
The guard was initially called in early Monday morning.
"We have long memories and our reach is very wide," the attorney general said.
The VP said he had made a donation for amyotrophic lateral sclerosis.
Reaction broke down strongly along racial and political lines.
The U.S., unlike some European nations, would not pay the terrorists.
Approval of the president's foreign affairs decisions has fallen 14 percentage points.
FERGUSON, Mo.— Police made only six arrests compared to 47 arrests made the night before.