Donald Trump has seized on the government shutdown as an opportunity to reshape the federal workforce and punish detractors.

“What we are experiencing is not simple conflict — it is manipulation, defiance and harmful behavior that has created an unsafe and unsustainable environment,” the letter says.

As the finger-pointing persisted, the economic pain became more likely to spread.

Travelers could see longer TSA lines and flight issues if the shutdown continues.

Not all federal workers are furloughed, with significant exemptions in some agencies. Excepted employees, or those whose work includes protecting life and property, are expected to continue working.

Bills to shield patients from medical debt failed this year in several states.

Scientific studies have tied ultraprocessed foods to poor health.