On Wednesday, the real estate mogul's campaign announced that a well-known Republican strategist, Rick Wiley, would be joining the team as national political director.
"Trump's complaints about party corruption fit with his campaign's hirings," said James Campbell, a professor of political science at the University at Buffalo.
"It seems clear that the Trump campaign now sees that it has put itself at a disadvantage by not being adequately staffed to handle both party and staterules and procedures regarding delegate selection methods and issues of how delegates are bound to candidates," Campbell told ABC News.
Trump is facing the possibility of a contested convention if he fails to secure the 1,237 delegates needed to win the nomination outright. In that case, a number of delegates who are pledged on the first ballot become free to vote for whomever they want on the second.
"Unless Trump can [cobble] together a ... round majority, he is going to have a very difficult time winning on a second ballot," Campbell said.
Wiley isn't the only big-name hire that Trump's campaign has announced in recent weeks.
On the same day as Manafort's announcement, which came more than nine months after Trump announced his candidacy, the campaign also announced it was opening a D.C. office "to coordinate his campaign’s work with the Republican National Committee, Congress, and his convention and delegate operations."
The series of moves, as well as Trump's complaints against what he sees as corrupt actions of the RNC, suggest that Trump may be working to lock down the nomination in the face of a series of efforts to thwart him.