Los Angeles Times.)
Trump has denied many times that he (or his campaign) colluded with Russia to affect the 2016 election (in his favor), but there is already much evidence that the collusion was real. Some of that evidence comes from the Steele Dossier. Republicans have done their best to denigrate that dossier, but the truth is that most of it has already been shown to be true (and once Mueller's investigation is finished, it is very likely it will all be shown to be true).
There is something the dossier contains that is not being reported. The collusion agreement was not a one-way street. The Russians gave information to Trump (and used social media to help him), but they wanted something in return. The Steele Dossier says they wanted information from Trump on Russians in the United States -- and Trump very likely gave them that information.
Consider this part of an article by Mark Sumner at Daily Kos: