Advisers say that Trump regularly makes the same policy promises on the campaign trail that he does behind closed doors with wealthy donors, and evidence has not emerged that Trump has directly linked a specific policy outcome to a specific donation. Oftentimes, his comments at the events are about foreign policy and topics he discusses at rallies, such as inflation and immigration. For example, at one event, he suggested that he would have bombed Moscow and Beijing if Russia invaded Ukraine or China invaded Taiwan, surprising some of the donors.
https://www.washingtonpost.com/politics/2024/05/28/trump-wealthy-donors-fundraising/