WASHINGTON — The Republican presidential nomination may be in his sights, yet Donald Trump has so far ignored vital preparations needed for a quick and effective transition to the general election.

The New York businessman has collected little information about tens of millions of voters he needs to turn out in the fall. He’s sent few people to battleground states compared with likely Democratic rival Hillary Clinton, accumulated little if any research on her, and taken no steps to build a network capable of raising the roughly $1 billion needed to run a modern-day general election campaign.

“He may be able to get by on bluster and personality during the primaries, but the general election is a whole different ballgame,” said Ryan Williams, a veteran of Mitt Romney’s presidential campaigns. “They’re essentially starting from zero heading into the general election.”

The billionaire’s aides acknowledged they’ll tap into the resources of the party’s establishment – the Republican National Committee, above all – as the scale and scope of the 2016 contest grow exponentially. That’s even as he rails daily against his party’s establishment as corrupt, and they predict his unique success so far will pay off again in November.

“Our ability to run a different type of campaign against Hillary Clinton in a general election is unique to the success that Mr. Trump has shown in the primaries,” said Corey Lewandowski, Trump’s campaign manager.

Trump’s late start marks a sharp break from past Republican campaigns and that of Clinton, who is already beginning to shift resources to the November election.

Trump has taken steps in recent week to add experienced political staff to expand his bare-bones organization. Yet the team has been consumed by playing catch up with Republican rival Ted Cruz, devoting almost no energy or planning to the next phase. Trump hopes he can score a victory in the Indiana primary Tuesday that can effectively end Cruz’s bid.

Lewandowski and other aides have also signaled a willingness to work closely with the Republican National Committee should Trump claim the nomination – “hand in glove,” in Lewandowski’s words.

Ed Brookover is working from a recently opened Washington-area office that is tasked with developing Trump’s detailed policy prescriptions and working with allies on Capitol Hill.

“From all reports – we’ve not gone in and kicked the tires yet – the RNC’s got a larger ground game already in place than ever before,” Brookover said. “And they’ve been investing an incredible amount of money on data.” He said that’s “going to be incredibly helpful.”