The USA budget deficit widened to a 6-year high in February 2018 to USD$215b.

http://money.cnn.com/2018/03/12/news/economy/budget-deficit/index.html

https://tradingeconomics.com/united-states/government-budget-value

The USA budget deficit widened to a 6-year high in February 2018 to USD$215b.  This shows that the USA economy is based on credit financing and the USA has to keep issuing government bonds to fund its economy.  If the interest rates go up too fast, the USA will have a heavy burden to finance its national debt of more than US$20t.  If the USA has to borrow US$200b per month to finance its economic growth, it is subjecting itself to a very dicey situation because the recent bond sales are underwhelming.

What is this budget deficit?

We'll explain budget deficit in a simplified way.

First, there must be a fiscal deficit before the budget deficit.  Fiscal deficit happens when the government's revenue cannot meet its expenditure, resulting in a shortfall.  Then, the government has to borrow money to meet this cash shortfall and this is what we called a budget deficit.

When the revenue is equal to the expenditure, the budget is neutral (no surplus or deficit).