How do you know a politician is lying to you? Simple: His lips are moving.

Yes, it’s an old one — but none the worse for that.

The 2020 election season is getting into full swing. Politicians on all sides are ramping up their rhetoric, including their promises, forecasts and accusations.

But it’s fascinating what you can find out if you just read official documents. Especially some of the fine print.

And here are 10 remarkable forecasts and assumptions that Washington is making and isn’t telling you. These are all contained in the Congressional Budget Office’s most recent Long-Term Budget Outlook, the cornerstone document of government financial and economic planning.

1. We’re going to have a lot more immigrants. A lot. They’re expecting a net 22.5 million more immigrants to come to the U.S. over the next 20 years. By 2049, they’re expecting immigration to account for a stunning 87% of annual population growth. […]