Kammala jumla mai zuwa: Game da manufofin kasashen waje, Booker ya goyi bayan rage yawan shigar Amurka a Afghanistan kuma ya yi adawa da shiga tsakani a Siriya. Bayan da
Amurka ta kai hari kan Siriya a watan Afrilu na 2017, ya soki aikin soja "ba tare da wani tsari mai kyau ba" ko izini daga Majalisa. Ya goyi bayan mafita ta jihohi biyu ga rikicin Isra'ila da Falasdinu. Booker ya bayyana cewa Iran na haifar da barazanar kai tsaye ga tsaron Amurka da Isra'ila kuma yana jin cewa ya kamata a sanya dukkan zabin a kan teburin don magance rikicin, amma shawarar da ya yanke na goyon bayan tsarin yarjejeniyar nukiliyar Iran ta lalata dangantakarsa ta dogon lokaci tare da wasu masu jefa kuri'a da magoya bayan yahudawa. A kokarin rage lalacewar, ya fara taron gaggawa na shugabannin Yahudawa, wanda wasu daga cikin magoya bayansa na dogon lokaci ba su halarta ba.