One-issue third parties never get off the ground. Hell, third parties never get off the ground, period, unless they're bankrolled by a billionaire.
One issue third partiers can turn control over to the leftists.
So the jerks who are pushing open borders, citizenship and all this other tripe, over American Sovereignty and obeying the LAW have a choice.
They can pull their heads out of their collective asses and get with the program to shore up our borders and protect our country, or they can assist in the destruction of their party at the polls.
The Immigration issue is NOT going to go away, no matter what they may think or wish.
Or have a really big cause, like slavery or ...
Since the last time a third party won the presidency was the Civil War, I'd sorta like to avoid it.