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Last Thursday, Congress ended the longest Department of Homeland Security shutdown in American history . For 75 days, tens of thousands of TSA officers worked unpaid. More than 1,100 of them quit . Airport security lines stretched for hours.

The immediate fight is over. The next one is already on the calendar: this appropriation expires Sept. 30. And the battle will keep going, every funding cycle, until we change what we’re funding.

The standoff that produced this shutdown was a fight over Immigration and Customs Enforcement, not airport security. But since ICE and DHS sit inside TSA, airport security became collateral damage in a dispute that had nothing to do with it. That structural problem won’t fix itself.

Congressional dysfunction is a problem, but it’s not the only one made plain by this standoff.…