Republican presidential nominee Donald Trump is set to get his first classified security briefing Tuesday in New York.

The briefings are given to both party nominees under a system that goes back decades.

The high-level briefing will be delivered by the office of the director of national intelligence.

Trump is set to bring along two advisors: New Jersey governor Chris Christie and retired Lt. Gen. Michael Flynn, ABC News reported.

Republican Donald Trump is set to get his first classified security briefing in New York on Wednesday

Both were on Trump's short list to be his vice presidential running mate.

The tradition began after Vice President Harry Truman assumed office without having knowledge of the Manhattan Project to develop a nuclear bomb.

Last month, President Obama took a shot at both Trump and Hillary Clinton when discussing the issue of the classified briefing.

"We are going to go by the law, which is that, in both tradition and the law, that if somebody is the nominee ... they need to get a security briefing so that if they were to win, they are not starting from scratch in terms of being prepared," the president said.

Asked whether he was concerned about Trump getting the briefing, following Trump's statements about having seen video of a 'ransom' payment being delivered to Iran for the release of Americans held there, Obama said: "What I will say is that they have been told these are classified briefings. And if they want to be president, they got to start acting like president, and that means being able to receive these briefings and not spread them around.'

Trump plans to bring New Jersey governor Chris Christie, an advisor and a former federal prosecutor, ABC reported.

FBI director James Comey admonished Clinton for her 'extremely careless' handling of classified information on her home email server.

It isn't clear that either nominee will get the keys to the kingdom, intelligence-wise.

'He's going to get some briefings between now and Election Day. Frankly, they'll be labeled secret, but they'll be secret-light, former NSA chief Gen. Michael Hayden told MSNBC. 'They'll be generalized discussions. Both candidates will get them,' he added.

Trump gets his briefing on the same week he laced into Obama and Clinton's foreign policy and called for 'extreme vetting' of immigrants trying to enter the U.S. from 'volatile' countries.

Trump took heat last month when discussing the hack of Democratic National Committee emails, believed been orchestrated by the Russian government, when he said Russia should 'find the 30,000 emails that are missing' – a reference to Hillary Clinton's emails.