NSA whistle-blower Edward Snowden on Tuesday injected himself into an escalating cyberstruggle that could affect the U.S. presidential election. The reported hack of The Equation Group might have been a warning shot from Russia, Snowden claimed. The group, which is widely believed to be a front operation for the NSA, apparently was hacked over the weekend by a previously unknown outfit called the “Shadow Brokers,” which then claimed to have valuable files in its possession that would be available to the highest bidder.