Is wild shaped druid a valid target for Dominate Beast or Dominate Person?

@HHomiller @ChrisPerkinsDnDDruid uses wild shape, are they a valid target for dominate beast or dominate person? What about w/ polymorph? their type becomes beast, so they can be affected by spells according to that type

— (((Mike Mearls))) (@mikemearls) August 18, 2016