I don't believe that for a second.
In March '92 Perot LED in polling in a 3-way race. Substantially.
And, he was advocating a similar platform to Trump. There's a MAJORITY of Americans opposed to "Free Trade" AND Illegal Immigration/Illegals.
Many are White, Blue Collar Democrats...Reagan Democrats.
It's not only possible, but PROBABLE that a 3rd party...focusing on those issues and their ilk, would win at least 40 states in a POTUS plurality.
Who REALLY got Perot to drop out and how?