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President Barack Obama today called again for "peace and calm on the streets of Ferguson," addressing for the second time the police shooting death of 18-year-old Michael Brown and the violent clashes between police and protesters that have ensued.

"Let us remember we are all part of one American family," Obama said in a short address from Martha's Vineyard, where he is vacationing. "We are united in common values and that includes belief in equality under the law, basic respect for public order and the right of peaceful protest."

Obama also notably gave a vote of confidence to Missouri Gov. Jay Nixon. Obama said he talked with Nixon this morning and "I expressed my concern over the violent turn of events" in Ferguson.

"He is a good man and fine governor," Obama said.

Obama said he was briefed this morning on the situation in Ferguson by Attorney General Eric Holder. He criticized the arrest of journalists, said there is no excuse for police use of force against peaceful protesters, and that there is "never an excuse for violence against police or those who would use this as a cover for vandalism or looting."

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Chuck Raasch is a reporter for the St. Louis Post-Dispatch.