Indeed. and this Post article, too.
https://www.washingtonpost.com/world/national-security/mueller-gathers-evidence-that-2016-seychelles-meeting-was-effort-to-establish-back-channel-to-kremlin/2018/03/07/b6a5fb8c-224b-11e8-94da-ebf9d112159c_story.html
Sure seems like Mueller is honing in on Hillary