Does a booming economy make Trump unbeatable?

Over a decade since the Great Recession, the U.S. economy seems to be on a roll: Wage growth is relatively high, inflation is low, unemployment is really low, and the stock market is booming. Despite President Trump's impeachment — not to mention his erratic, bullying, bigoted behavior — could the economy nonetheless hand him a second term in 2020?

It's definitely a possibility. In fact, a number of observers who run models of elections are already predicting Trump will take home the win. But nothing is certain, and such predictions hinge on the crucial assumption that economic indicators mean the same thing today that they meant one or two or three or more decades ago.