Donald Trump is spending the night in Miami, Florida, before he appears in court there on Tuesday charged with mishandling national security files, BBC reported.

The former US president is facing dozens of charges of illegally retaining classified information, including some about nuclear secrets.

It is the second time this year he has been charged with a crime.

Trump, campaigning to make a return to the White House in 2024, has denied wrongdoing as he faces the first ever federal criminal prosecution against a former US president.

Last week's 37-count indictment comes after more than 100 documents with classified markings were found at Trump's private Florida resort Mar-a-Lago in August.

Trump will meet with his attorneys before the aforesaid court session. It is yet unclear who will represent him interests in Florida.