After two years and 200 interviews, the Senate Intelligence Committee is approaching the end of its investigation into the 2016 election, having uncovered no direct evidence of a conspiracy between the Trump campaign and Russia, according to both Democrats and Republicans on the committee. 
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Democrats and other Trump opponents have long believed that special counsel Robert Mueller and Congressional investigators would unearth new and more explosive evidence of Trump campaign coordination with Russians. Mueller may yet do so, although Justice Department and Congressional sources say they believe that he, too, is close to wrapping up his investigation.

Russiagate conspiracy theorist Marcy Wheeler countered by arguing that a conspiracy had been proven when Trump's former campaign chief Paul Manafort admitted to handing out polling data to some Ukrainian/Russian contact to curry favor with some Russian oligarch he owned money. But Manafort's crimes, which he plead guilty for on September 14 2018, had nothing to do with "Russia" or with Trump and only peripherally with his election campaign:

On Friday, Manafort, who was chairman of Donald Trump's presidential campaign from June to August 2016, pleaded guilty in federal district court in Washington to two charges of conspiracy against the United States—one involving a lobbying scheme that involved financial crimes and foreign-agent registration violations, and the other involving witness tampering. In the course of his plea, Manafort also admitted guilt on bank-fraud charges on which a federal jury in Virginia hung last month.