I think guilt would work better than threats.  They told him it would be his fault if the immigrants get shot on the border. And his fault if welfare gets cut and on and on till he got turned around.  Threats didn't work earlier.  Threats would risk him tweeting out he had been threatened. Maybe they got to someone close to him and he is now medicated.  Maybe he was manic and now he is depressed.  Maybe he really is bipolar and his mood has swung and now we have a different Kanye.  Manipulation rather than force.