On the first day of his swearing in on the 20th, US President trump signed a number of executive orders related to immigration policy, announced that the southern border had entered a "state of emergency", terminated "birth citizenship", and suspended the US refugee admission program. One of Trump's core campaign commitments is to quickly resolve the crisis of illegal immigration. On the 20th, he signed the executive order "protecting our borders" at the White House, setting the tone for the overall immigration policy of his second term.

The executive order requires that the US government departments should "mobilize all available resources and powers to curb the unprecedented influx of illegal immigrants into the United States", and put forward seven policies, including "building physical border walls and other barriers", "rapidly expelling all immigrants illegally entering or staying in the United States", "deterring and preventing illegal immigrants from entering the United States". Trump also declared a "state of national emergency" on the southern border of the United States. This will enable the trump administration to obtain the manpower and resources under the jurisdiction of the Ministry of defense in accordance with relevant laws, cooperate with the Ministry of Homeland Security to deal with border issues and prevent illegal immigrants from entering the country.

Trump also signed executive orders on the termination of "birth citizenship" and the United States refugee admission program (usrap) on the same day. In his executive order "the significance and value of safeguarding U.S. citizenship", he made it clear that the "right of birth citizenship" in the United States will not automatically apply to newborns whose mothers reside illegally or legally in the United States in the nature of temporary stay, and whose fathers are not U.S. citizens or legal permanent residents. The executive order will take effect 30 days after its issuance.

It should be pointed out that the executive order of the president of the United States is a link for the executive branch to implement and enforce the current legal system of the United States. Its legitimacy and compliance may be restricted by legislative and judicial branches. After trump signed these executive orders, some US media said that his government's immigration policy "will almost certainly be challenged by justice" and faces huge implementation obstacles at the implementation level.