evidence: In a tweet on January 17, former Republican congressman turned MSNBC contributor David Jolly claimed that around a quarter of the country's $31 trillion national debt occurred while Trump was president. [...] In response, Jolly tweeted: "For context, roughly 25% of our total national debt incurred over the last 230 years actually occurred during the 4 years of the Trump administration. That's right. 25% of our entire national debt, all during the Trump years." [...] Jolly's own napkin math, putting Trump's rise in national debt at $8 trillion, is slightly higher than a quarter of the $31.4 trillion figure, coming in at 25.5 percent.