Campaign swag and printing: $958,836
About a dozen companies were paid for hats, pens, T-shirts, mugs, stickers and printing services.
Air charters: $838,774
Nearly $350,000 of the money spent on private jets went to Trump's own TAG Air.
Event staging and rentals: $830,482
This includes the fees for renting facilities such as the Anaheim Convention Center ($43,000) and the Fresno Convention Center ($24,715). But the biggest sum went to Trump's own Mar-a-Lago Club in Palm Beach, Fla., which was paid $423,317 for rental and catering. The Trump National Golf Club in Jupiter, Fla., got $35,845, while the Trump International Golf Club in West Palm Beach, Fl., was paid $29,715. His son Eric Trump's wine company received nearly $4,000.
Payroll and consultants: $684,337
Trump had less than 70 people on staff in May, versus Hillary Clinton's 683. But his top aides were paid well: now-departed campaign manager Corey Lewandowski and deputy campaign manager Michael Glassner each received $20,000 for the month, while the firm of Dan Scavino, director of social media, got nearly $21,000. Eli Miller, who came aboard as the chief operating officer in mid-May, was paid $13,038.
Data and technology: $603,143
Giles-Parscale, a San Antonio-based Web-design firm that began working for Trump's companies in 2011, received two big payments totaling $543,000.
Direct mail and telemarketing: $253,969
The bulk of the payments went to a Purcellville, Va.-based company called Left Hand Enterprises, which was registered in Delaware in late April by an incorporation service. It is unclear who owns it.