It's likely Paul Manafort had something to do with that change in the GOP platform. Something that I missed until very recently is someone hacked text messages made by Manafort's daughter, revealing some interesting info regarding Manafort's work in the Ukraine...
https://www.businessinsider.com/paul-manafort-daughter-text-messages-ukraine-2017-3
"In a series of texts reviewed by Business Insider that appear to have been sent by Andrea to her sister, Jessica, in March 2015, Andrea said their father had "no moral or legal compass."
"Don't fool yourself," Andrea wrote to her sister, according to the texts. "That money we have is blood money."
"You know he has killed people in Ukraine? Knowingly," she continued, according to the reviewed texts. "As a tactic to outrage the world and get focus on Ukraine. Remember when there were all those deaths taking place. A while back. About a year ago. Revolts and what not. Do you know whose strategy that was to cause that, to send those people out and get them slaughtered."........
".........In a series of texts to a friend in March 2015, Andrea appears to have said Ukraine was "late in paying" her father.
"He is cash poor right now," the text said. "And now Ukraine is late in paying him."
In a later exchange with a man who appeared to be Andrea's cousin — and one of her father's former employees — Collin Bond, Andrea appears to have said her mother and father couldn't go through a "public divorce" because Manafort had "too many skeletons" and "his work and payment in Ukraine is legally questionable."