Secondly, the claim that the Russian government offered Trump a share of Rosneft came from a really dodgy dossier. Supporters of the dossier touted the fact that it correctly predicted the percentage of Rosneft share sold as proof the source had inside knowledge, but it was in fact public knowledge that the Russian government wanted to sell that percent of Rosneft and had been reported in Bloomberg a few weeks before the supposed source mentioned it. So it's all too plausible that the source was merely combining public information with what the person paying them wanted to hear.
What? Where are you getting that from (that it's "the major allegation")? It was just one of many claims in the Steele Dossier.
IIRC, in the Steele dossier, that stake in Rosneft (~15% or something?) was offered to Trump and he turned it down. That stake continued to be shopped around and recently was bought by a joint venture between Qatar and others, and some of the buyers can't be identified.
TBH, I'm not really sure why Trump would need to relieve sanctions in order to get a stake in this, as it's clear they've been shopping it around for a while.
Well, it's probably cheaper.
Do you have a source?
Edit: If you're downvoting because I'm wrong please correct me. If it's just because you don't like what I said then carry on I guess.
The major allegation on the table right now is that the Russian government offered Trump a sizeable share of Rosneft, the Russian national petrochemical corporation, in exchange for dropping the sanctions against Russia due to the conflict in Ukraine, and both parties followed through with the deal. The sanctions were relaxed by the Trump administration within the first month of coming into office while a stake in Rosneft has been sold to an anonymous buyer behind a cayman islands holding company.