That's an excellent question I'd like to know the answer to. I've personally known lots of people who were ideologically predisposed towards certain biases who would consistently predict outcomes of political events incorrectly.
e.g. "if <insert presidential candidate> is elected, that's gonna be the end of America" with similarly failed predictions over the next four years when that candidate is elected.
e.g. "if <insert presidential candidate> is elected, that's gonna be the end of America" with similarly failed predictions over the next four years when that candidate is elected.