What justification has Trump given for the travel bans?

WASHINGTON: United States President Donald Trump said the full travel bans and partial restrictions — affecting 19 countries in total — were because of what he called national security and public safety threats. 

Several countries were banned because of concerns over terrorism and their governments’ lack of screening and vetting measures.

These include Afghanistan, Iran, Libya, Somalia and Cuba. 
 
Other countries, such as Sudan, Haiti, Yemen and Eritrea, are on the list because they don’t have a “competent or cooperative central authority for issuing passports or civil documents,” the White House said in a statement. 
 
For other nations, such as Chad, the Republic of the Congo and Equatorial Guinea, the White House pointed squarely to high visa overstay rates.

As well as having high overstay rates, some countries have also historically refused to take back their own citizens, the White House said, such as Myanmar, Laos, Sierra Leone and Venezuela.

Also read: Trump slams travel ban on citizens from 12 countries, restricts seven