President Trump promoted or retweeted various rallies that were organized by the IRA.
On September 10, 2017, President Trump’s personal account @realDonaldTrump responded to a tweet from the IRA-controlled account @10_gop (the backup account of @TEN_GOP, which had already been deactivated by Twitter). The tweet rad: “We love you, Mr President!”
Mueller Report Volume 1, page 34
With a following in the tens of millions on Social media, a “re-tweet” or mention of a tweet, is normally considered an approval. And this is even more true when the President provides thanks in the mention