Kremlin Responds To Mueller Indictment:

“Russia does not feature in the charges that were leveled in any way. Other countries and other people feature (in the charges),” Peskov said, according to the news service adding that “Moscow never felt itself guilty so as to feel exonerated now,” when asked whether the Kremlin interpreted the indictment as proof that its denials about meddling in the U.S. presidential election had been confirmed.

Peskov said the investigation was an internal matter for the United States which Russia was not involved in, but was following with interest from afar.
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In the words of Sun Tzu (Art of War): 
"When the enemy is in the process of destroying himself, stay out of his way."