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There is nothing in the 31 pages this indictment alleging tax fraud, money laundering indictment which also relates to allegations of influencing the outcome of the last election in the USA. Perhaps Mueller can investigate possible influencing of the outcome of the Ukrainian election. The last US investigation report into alleged Russian influencing the outcome of the last election produced no certain conclusion which is made clear in the conclusive statements.
That's intentional. Mueller is empowered to bring prosecutions against matters arising directly from his investigation of collusion. This indictment establishes the motivation for Manafort's efforts on behalf of the Putin regime, and it gives Mueller a lot of leverage over Manafort and Gates. So the indictment was never intended to establish collusion.
The real shocker here is Papadopoulos, who was a top-level "foreign policy advisor". Remember how desperate Trump was to find warm bodies for that job? Now Trump is calling him an unpaid volunteer who hardly anybody knew. (He was found wandering the streets one day and offered the job because of his foreign-sounding name, apparently.) He has pleaded guilty to lying about details surrounding his attempt to get the Trump campaign to coordinate with the Russian government, which he had been told had just a ton of emails from the Clinton campaign. Apparently, nobody outside of Mueller's investigation knew about this, and Papadopoulos just spent three months as an FBI informant. While nobody knew he was working for Mueller.
According to Trump's mouthpiece, Sarah Huckabee Sanders, it was all pretty innocent, because Papadopoulos called for a meeting that never happened. But lots of other stuff actually did happen, and now nobody knows what Mueller knows or who else might be an FBI informant. Very interesting times for those who held high-level positions in the Trump campaign and now may get a visit from the FBI.