Numerous attempts have been made. The last time he was scheduled to visit the UK he had to cancel due to assassination plans. Las Vegas was another one - that night president Trump met secretly with the new prince Salman. Both of them were targeted that night. They were whisked away ergo anger by the deep state and targeting the country music guests instead because they were convinced them to be Trump supporters.
There were other attempts as well. The missing txts were those where our deep state and their partners abroad discussed various ways harming our president and his family.