In 1958 a television series called Trackdown featured a segment in which a con man rode into town offering to protect the residents from certain death:
"Without my help and knowledge, every one of you will be dead... I am the only one! Trust me! I can build a wall around your homes that nothing will penetrate."The 4-minute video embedded above is a trailer. You can view the entire episode in a 23-minute video embedded at BoingBoing.
"You're a liar, Trump."
BTW, the actor playing the part of the Texas Ranger Hoby Gilman is a very young Robert Culp.