Congress and President Obama spent a lot of money to stimulate the economy during and after the Great Recession. America has run a deficit every year since Obama took office, although it's become smaller. The latest deficit was the lowest since 2007.

Many economists keep an eye on the debt-to-GDP ratio, a look at how much debt America has relative to the size of the economy.

When President Obama took office, that ratio was around 50%. Now it's 75%, according to White House estimates for 2015.