Trump expected to order temporary ban on refugees

Trump, who tweeted that a "big day" was planned on national security on Wednesday, is expected to ban for several months the entry of refugees into the United States, except for religious minorities escaping persecution, until more aggressive vetting is in place.

Another order will block visas being issued to anyone from Syria, Iraq, Iran, Libya, Somalia, Sudan and Yemen, said the aides and experts, who asked not to be identified.

In his tweet late on Tuesday, Trump said: "Big day planned on NATIONAL SECURITY tomorrow. Among many other things, we will build the wall!"

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The border security measures probably include directing the construction of a border wall with Mexico and other actions to cut the number of illegal immigrants living in the United States.

The sources say the first of the orders will be signed on Wednesday. With Trump considering measures to tighten border security, he could turn his attention to the refugee issue later this week.

Stephen Legomsky, who was chief counsel at U.S. Citizenship and Immigration Services in the Obama administration, said the president had the authority to limit refugee admissions and the issuance of visas to specific countries if the administration determined it was in the public’s interest.

"From a legal standpoint, it would be exactly within his legal rights," said Legomsky, a professor at Washington University School of Law in St. Louis. "But from a policy standpoint, it would be terrible idea because there is such an urgent humanitarian need right now for refugees.”

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The Republican president, who took office last Friday, was expected to sign the first of the orders at the Department of Homeland Security, whose responsibilities include immigration and border security.

On the campaign trail, Trump initially proposed a temporary ban on Muslims entering the United States, which he said would protect Americans from jihadist attacks.

Both Trump and his nominee for attorney general, Senator Jeff Sessions, have since said they would focus the restrictions on countries whose migrants could pose a threat, rather than a ban on those of a specific religion.

Many Trump supporters decried former President Barack Obama's decision to increase the number of Syrian refugees admitted to the United States over fears that those fleeing the country's civil war would carry out attacks.

Detractors could launch legal challenges if all the countries subject to the ban are Muslim-majority nations, said immigration expert Hiroshi Motomura at UCLA School of Law.

Legal arguments could claim the executive orders discriminate against a particular religion, which would be unconstitutional, he said.

"His comments during the campaign and a number of people on his team focused very much on religion as the target," Motomura said.

To block entry from the designated countries, Trump is likely to tell the State Department to stop issuing visas to people from those nations, according to sources familiar with the visa process. He could also instruct U.S. Customs and Border Protection to stop any current visa holders from those countries from entering the United States.

White House spokesman Sean Spicer said on Tuesday the State and Homeland Security Departments would work on the vetting process once Trump's nominee to head the State Department, Rex Tillerson, is installed.

Other measures may include directing all agencies to finish work on a biometric identification system for non-citizens entering and exiting the United States and a crackdown on immigrants fraudulently receiving government benefits, according to the congressional aides and immigration experts.

To restrict illegal immigration, Trump has promised to build a wall on the U.S.-Mexico border and to deport illegal migrants living inside the United States.

Trump is also expected to take part in a ceremony installing his new secretary of homeland security, retired Marine General John Kelly, on Wednesday.

Trump's executive order threatens a refugee resettlement deal with Australia signed late last year, and could leave more than 1,000 asylum seekers in limbo.

The U.S. agreed to resettle an unspecified number of refugees being held in Papua New Guinea (PNG) and the tiny South Pacific island nation of Nauru on Australia’s behalf, under a deal to be administered by the U.N. refugee agency.

"Any substantial delay in the relocation of refugees...would be highly concerning from a humanitarian perspective," Catherine Stubberfield, a spokeswoman of the U.N. High Commissioner for Refugees, told Reuters by email.

"These men, women and children can no longer afford to wait."

The deal followed agreement by Australia in September to join a U.S.-led program to resettle refugees from Guatemala, Honduras and El Salvador as part of its annual intake.

Australia's tough border security laws mandate that asylum seekers intercepted trying to reach the country by boat go for processing to detention camps on PNG's Manus island and Nauru.

Australia does not provide information on the nationalities of those held, but around a third of the 1,161 detainees were from countries covered by the executive orders, lawyers and refugee workers for the asylum seekers told Reuters.

"We already didn't have much hope the U.S. would accept us," Behrouz Boochani, an Iranian refugee who has spent more than three years on Manus island, told Reuters.

"If they do not take us, Australia will have to."

A spokeswoman for Australia's Prime Minister Malcolm Turnbull declined to comment.

(Reporting by Julia Edwards Ainsley; Additional reporting by Mica Rosenberg; Additional reporting by Colin Packham in Sydney; Editing by Leslie Adler and Clarence Fernandez)