The President has a duty to preform !!!
Duty | Definition of Duty at Dictionary.com
https://www.dictionary.com/browse/duty
Duty definition, something that one is expected or required to do
by moral or legal obligation.
From the link:
Article II, Section 3 of the U.S. Constitution makes it very clear that it is incumbent on the president of the United States to enforce American laws — including immigration laws.
The Constitution states of the president, “He shall take care that the laws be faithfully executed.”