Article continues below advertisementLawrence O'Donnell is taking aim at Donald and Melania Trump's only son, Barron.During the Wednesday, March 25, episode of "The Last Word" podcast, the MS Now host criticized Barron, 20, amid growing online chatter about drafting him into his father's war in Iran. The commentary comes as parody site draftbarrontrump.com gains traction following the February 28 military action.Article continues below advertisementSource: MS NowLawrence O'Donnell criticized Barron Trump on his show.