Criminal from the future Tempus runs for president as "John Doe" and uses a subliminal device to make everyone think "John Doe is a darn nice guy." Clark has nightmares of losing Lois, made worse when she looks into making out a will.
Tempus shows up in Metropolis as "John Doe," and he is winning the presidential race! Clark and Lois are the only ones who can see what's really going on.