And if you want to read about how the investigation was properly predicated, here's the IG report: https://oig.justice.gov/reports/2019/o20012.pdf
The existence and thoroughness of this report begs the question as to why the Durham investigation was ever needed in the first place.
you may find such things as "The Russian govemment directed extensive activity, beginning in at least 2014 and carrying into at least 2017, against U.S. election infrastructure' at the state and local level." and "The Committee found that the Russian government engaged in an aggressive, multi-faceted effort to influence, or attempt to influence, the outcome of the 2016 presidential election."
[1] https://www.intelligence.senate.gov/sites/default/files/docu...
[5] https://www.intelligence.senate.gov/sites/default/files/docu...