.@Facebook Zuckerberg &amp; Co. on notice. Perhaps the most forceful statement from POTUS on @fbnewsroom’s freewheeling dissemination of  disinfo. Look fwd to @profgalloway @karaswisher @PivotPod comment. One more version of . @ceciliakang @sheeraf  https://t.co/PmmkOsDqHk https://t.co/UZyMefVuSW