In the course of Donald Trump’s rise to pow­er, peo­ple have repeat­ed­ly been ask­ing, Why did he tweet that? What was he think­ing about?” Our fas­ci­na­tion with his men­tal states high­lights a very impor­tant ques­tion for us: What hap­pens in our minds and brains when we try to influ­ence oth­ers?