Donald Trump is running against Joe Biden, but Trump keeps bringing up another Democrat, Jimmy Carter. Trump likes to cite the 99-year-old Carter as a measuring stick to belittle Biden. Trump calls Carter a happy man because, according to Trump, Biden's performance in office makes Carter's presidency look good in comparison. It was once common for Republicans to mock Carter, who lost in a landslide to Ronald Reagan in 1980 amid inflation, energy shortages and the Iran hostage crisis. Trump's implication is that Biden's economy makes Carter's look better. Federal figure...