Donald Trump

Critics had called Mr Obama's guidance government overreach which threatened other students' privacy and safety.

White House spokesman Sean Spicer said Mr Trump firmly believed "this is a states' rights issue".

"I would expect further guidance to come out on that today," he told a news conference.

Though the Obama-era order will be rescinded, anti-bullying safeguards are expected to remain in place, the AP news agency reported, citing a government official.

Undocumented immigrants arrested for traffic violations or shop-lifting will be targeted along with those convicted of more serious crimes.

The memos do not alter US immigration laws, but take a much tougher approach towards enforcing existing measures.

There are an estimated 11 million illegal immigrants in the US.

White House Press Secretary Sean Spicer said on Tuesday the new guidelines would not usher in mass deportations, but were designed to empower agents to enforce laws already on the books.

They're also immigrants who are already feeling the effects of the new administration.

Sources said the new order will clarify a point that caused confusion the first time around: The executive order will not impact green card holders.

He will replace Lt Gen Michael Flynn who was fired after just three weeks and three days in the job.

A lieutenant general with the US Army, HR McMaster served in Iraq and Afghanistan, where he worked on a government anti-corruption drive.

Mr Trump's first choice, retired Vice Admiral Robert Harward, turned down the role, citing "personal reasons".

Who is Lt Gen HR McMaster?

Craig Deare was removed from his role as a senior adviser at the National Security Council's Western Hemisphere division Friday and "sent back to his original position," said Sarah Sanders, a White House spokeswoman. Deare had been assigned to the NSC by the Trump administration.

In his first month in office, Trump has found the vast government machine can't be reset at a president's whim with the same ease that an executive can manage a business. Rival power centers in the courts, the bureaucracy and Congress can emerge as a threat at any point.

The hacked server, secure2.donaldjtrump.com, which isn’t directly linked to the campaign’s home page, is behind CloudFlare’s content management and security system, Ars Technica reports.

The certificate of the server is legitimate and it looks like a real Trump campaign server. However, the image displayed is linked to some other website. The picture shows the following text:

Addressing a rally on Saturday, he had said, "look at what's happening last night in Sweden", as he listed parts of Europe hit by terrorist attacks.

With no such incident reported in Sweden on Friday, the country asked the US administration for an explanation.

Mr Trump tweeted on Sunday that he had been referring to a TV report.

He said it had been broadcast on Fox News but did not say when. He may have been referring to a Fox News programme on Friday night, which looked at refugees and crime in Sweden.

He has selected four candidates: adviser Keith Kellogg; former UN ambassador John Bolton; Lt Gen H R McMaster; and Lt Gen Robert Caslen.

The role became vacant when Lt Gen Michael Flynn was fired after just three weeks and three days in the job.

Mr Trump's first choice, Retired Vice Admiral Robert Harward, turned down the role, citing "personal reasons".

Gen Flynn stepped down after misleading Vice-President Mike Pence over his conversations with Russia's ambassador to the US.