It’s worth wondering what the impact might have been had the Senate Intelligence Committee’s final report on Russia’s interference in the 2016 election appeared six months ago, before the report of special counsel Robert S. Mueller III and the twisted account of it provided by Attorney General William P. Barr. On their own terms, the Senate’s findings, released Tuesday after a bipartisan investigation, are explosive: that then-candidate Donald Trump’s campaign chairman Paul Manafort “formed a close and lasting relationship” with “a Russian intelligence officer,” with…
