Former President Donald J. Trump quickly seized on the recent stock market downturn to criticize current leadership. On Monday, he posted on Truth Social, “Stock markets are crashing, jobs numbers are terrible, we are heading to World War III, and we have two of the most incompetent ‘leaders’ in history.” Trump’s remarks reflect his belief that economic indicators like the stock market are crucial measures of economic health. Senator JD Vance of Ohio, Trump’s running mate, echoed this sentiment, stating, “This moment could set off a real economic calamity around…