President Donald Trump has repeatedly said his approach to preventing terrorist attacks on U.S. soil won’t always be tidy. That’s especially true when it affects things like the already delicate task of compiling a wedding guest list. Just ask Shervin Taheran.

If reinstated by the judicial branch, Trump’s travel ban may prevent many family members and friends from entering the United States to celebrate personal milestones with their loved ones.

The new administration’s executive order temporarily denying entry into the United States to individuals from seven predominantly Muslim countries and all refugees has been, for now at least, blocked by federal courts. It is designed, the White House says, to keep would-be “radical Islamic terrorists,” to use the administration’s preferred term, out of the country.

Although no court has ruled in Trump’s favor, the president has said he may take his case to the Supreme Court, with his top aides saying he is “confident” he would win a case on the legal “merits” of his authority to issue such an order.