In a recent X exchange, billionaire investor Mark Cuban challenged Trump advisor Stephen Miller on the financial and societal impacts of their immigration and tariff policies. What Happened: On Sunday, Cuban took to X to question Miller’s stance on immigration, specifically the financial implications of deporting 20 million people. He asked, “Have you done any modeling of the financial impact of deporting 20 million people?” and expressed concern about the potential decline in GDP. See Also: Anthony Scaramucci: Trump Will Lose, Then ‘Start Panicking’ Over November Sentencing Cuban also questio…