“The Trump campaign announced it had brought on Manafort, a veteran political strategist, to help the real estate mogul prevent delegates from bolting and choosing another nominee at the Republican National Convention in July. Although Trump led the Republican field in both votes and delegates, he was still unpopular among many Republicans, and it was unclear if he would end up with the necessary delegates to prevent a floor fight at the convention. Manafort was picked in part because he was instrumental in Gerald Ford’s successful floor fight at the 1976 convention.
“Paul is a great asset and an important addition as we consolidate the tremendous support we have received in the primaries,” Trump said in a statement on March 29, 2016.
Manafort quickly got to work, ensuring the Trump campaign had a presence during the selection process and showing up to the Republican National Committee’s spring meeting in April.”
(…) “Manafort was later promoted from convention manager to campaign chairman and chief strategist. Manafort told ABC News that the Republican establishment was gathering behind Trump and acknowledging his likely nomination. “There’s a growing number of people supporting us,” he said. “They all recognize now that we definitely can win.”
One month later, Manafort’s influence within the campaign appeared even more cemented after Trump fired campaign manager Corey Lewandowski, with whom Manafort had a well-documented power struggle.” (Fortune, 3/22/2017)