(Bloomberg) — The top executives of 10 US airlines and aviation companies asked Congress to end the government shutdown that is affecting passengers.

“Americans — who live in your districts and home states — are tired of long lines at airports, travel delays and flight cancellations caused by shutdown after shutdown,” the letter published Saturday said. “Yet, once again air travel is the political football amid another government shutdown.”

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Signers include the chief executive officers of Delta Air Lines Inc., United Airlines Holdings Inc., American Airlines Group Inc., Alaska Air Group Inc., Southwest Airlines Co., JetBlue Airways Corp. and United Parcel Service Inc.

Transportation Security Administration officers just missed their first paycheck on Friday since the Department of Homeland Security shutdown began over a dispute between Democrats and Republicans over immigration raids.

“TSA officers just received $0 paychecks,” the letter said. “That is simply unacceptable. It’s difficult, if not impossible, to put food on the table, put gas in the car and pay rent when you are not getting paid.”

The executives also cited that with spring-break season under way, the shutdown is straining unpaid TSA officers at airports during a high-travel period. And this year’s FIFA World Cup and America’s 250th birthday celebrations are expected to bring a record 171 million passengers to the US, the CEOs said.

“It’s past time for the government to make sure that” affected workers are paid, they said.

The executives also asked Congress to pass three measures that would guarantee air traffic controllers and TSA officers are paid regardless of the government’s funding status.

Most DHS activity shut down Feb. 14 when Congress couldn’t reach an agreement on DHS funding following backlash over the Trump administration’s crackdown in Minnesota, which led to the killings of two American citizens by immigration agents. Immigrations and Customs Enforcement officers are still being paid under a separate funding mechanism.

Democrats have sought to require body cameras and judicial warrants for arrests, forbid the use of masks and expand the ability to sue DHS for alleged misconduct. Republicans have rejected the demands.