Jessica Rosenthal

Importantly, many non-essential federal workers end up being furloughed.

So things at the IRS slow down.

Or like TSA workers, they're expected to show up, but they get paid after a shutdown ends.

And this ends up causing delays as staff call out during the shutdown.

This time, though, the big shift is that the Office of Management and Budget has told all department heads to prepare for mass layoffs.

If there isn't enough funding for certain positions and employees are engaged in programs, projects or activities that are inconsistent with the president's priorities.

Jessica Rosenthal, Fox News.