Travel restrictions are still in place after an attack on the Oregon State Capitol in Portland on Monday that killed nine people and wounded 22.
A day later, President Donald Trump tweeted that he was looking into the possibility of a travel ban on people from seven Muslim-majority countries.
However, it appears as if Trump is also considering a broader ban on immigration from Iran, Syria, Iraq, Libya, Somalia, Sudan and Yemen.
Read more about travel restrictions and immigration in the aftermath of the attack.
On Tuesday, Trump signed an executive order temporarily banning travel to the United States from Iran.
It remains unclear whether the order will be enforced, though it has been blocked by courts.