These “scenarios” are trotted out every four years, much like the “the most important election ever” cries from both sides. Reagan won 49 states and amassed 525 electoral votes for his second term in 1984. That’s the landslide we’re looking for!
July 11, 1983 Harris Poll:
EARLY INDICATIONS SHOW CLOSE 1984 PRESIDENTIAL ELECTION
By Louis Harris
As the 1984 presidential race continues to unfold, it is becoming more and more likely that the basic pattern of that election will remain unchanged.
If Ronald Reagan chooses to run again, as is increasingly likely, it seems certain that the 1984 presidential election will be close, with neither the President nor his most probable Democratic opponents assured of any solid lead.
If the 1984 election for the White House is a cliff-hanger, this could give the ultimate edge to candidate Reagan, who is a known and effective campaigner.
Polls are always worthless, look at the comments from the September 1984 Reagan Poll: https://www.nytimes.com/1984/09/19/us/polls-show-many-choose-reagan-even-if-they-disagree-with-him.html