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The reason there may be no direct campaign finance charges against the Russians: not clear that much of this activity is actually illegal under current law: https://twitter.com/rickhasen/status/964562368540782592 …https://twitter.com/joshgerstein/status/964588533343309824 …
Here's an academic paper which has a part devoted to explaining why campaign finance law likely does not cover a lot of the activity by Russians alleged in the indictment: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3017598 …
