https://apnews.com/e2cac6573822f9c26780022929afb02f > PROVIDENCE, R.I. (AP) — Tesla CEO Elon Musk's great Twitter turnabout — in which he disclosed his massive stake in the social media company, got a seat on its board, publicly floated drastic changes and then turned down the board role — all happened in a week. > But its aftermath could linger if the mercurial billionaire who now holds a roughly 9% stake in Twitter continues to push forward his ideas for reshaping the business of social media.