Trump retained his private security team even after becoming President. it's likely the only reason he's still alive.

Archive.is is currently down so I was unable to archive these links-

Trump’s Private Security Force: an Operational and Legal Swamp

*Trump's precendent-breaking decision to retain a private security force raises troubling questions about transparency and accountability. *

https://prospect.org/power/trump-s-private-security-force-operational-legal-swamp/

Several past presidential nominees have used private security or, in the case of governors running for president, state police details. But the experts could not think of another example of a president-elect continuing with any private security after Election Day, when Secret Service protection expands dramatically for the winner. In fact, most candidates drop any outside security the moment they’re granted Secret Service protection.

Trump’s spending on private security, on the other hand, actually increased after he was granted Secret Service protection in November 2015.

Through the end of last month, Trump’s campaign had spent more than $1 million on private security contracting, compared with $360,000 spent by the campaign of his vanquished Democratic rival, Hillary Clinton, according to Federal Election Commission reports. That’s despite the fact that every other aspect of her campaign operation dwarfed his. Overall, her campaign outspent his by nearly 75 percent.

https://www.politico.com/story/2016/12/donald-trump-security-force-232797