In a letter dated Sunday, members of the group 9/11 Justice asked to meet with Mr. Trump and urged him not to host the event, set for July 29 to 31, noting that Mr. Trump has blamed Saudi Arabia for the attack.

“We simply cannot understand how you could agree to accept money from the Kingdom of Saudi Arabia’s golf league to host their tournament at your golf course, and to do so in the shadows of ground zero in New Jersey, which lost over 700 residents during the attacks,” they wrote in the letter.

“It is incomprehensible to us that a former president of the United States would cast our loved ones aside for personal financial gain,” they wrote to Mr. Trump, who is expected to run for president again in 2024. “We hope you will reconsider your business relationship with the Saudi golf league and will agree to meet with us.”