I'll share another bit....
Jimmy Carter may have been the most accessible of all former presidents in the 20th and 21st centuries.
After opening the Carter Center, he always had posted his schedule for Bible study at his local church.
Anyone and everyone who saw the announcements were invited to come to his church and after he was done with Bible study he would stay as long as it took to meet everyone who came to see him. He took pictures with them, and he'd sign stuff for them.