Trump complained about the "rotten political system" during a Sunday interview on ABC's "This Week."
"The Republican tabulation system is a broken system. It's not fair," he said.
"I won Louisiana and now I hear he's trying to steal delegates," Trump added, referring to Cruz. "What's going on in the Republican Party is a disgrace. I have so many more votes and so many more delegates."
According to the Wall Street Journal, Republican in Louisiana expect the five unbound delegates that had been awarded to Sen. Marco Rubio (R-FL) to back Cruz now that the Florida senator is out of the race. Cruz's supporters have also secured key positions on convention committees, which could help the Texas senator at a contested convention, according to the Wall Street Journal.
Jason Doré, the executive director of the Louisiana Republican primary, told the Times-Picayune that the party is "really confident in the rules" and is prepared for a lawsuit from Trump.
Doré said that any disagreement over Rubio's delegates is "is between Mr. Trump and those guys," and added that the delegates have not yet made any final decision.
"There's no commitments from any of these delegates -- the Rubio delegates or others -- that they're going to go for Cruz or for Trump," he told the Times-Picayune.