Since January 2017, three executive orders referring to immigrants have been issued by the president. All are controversial. In addition to funding a wall between the US and Mexico and re-prioritizing deportations, there is a proposed travel ban.
Of the three orders, the travel ban was re-written and issued again.
What is the travel ban? The purpose of the ban is to freeze travel from primarily Muslim countries. In early February a Washington court stopped (enjoined) the ban.
The president then drafted a new order rather than appeal this old one.
After releasing this new presidential order, a federal court in Hawaii came out with a nationwide injunction striking down all of the travel ban.
As of March 16, 2017, there is no suspension to travel to the U.S.