Airports in more than a half-dozen U.S. markets have declined to display a video in which Homeland Security Secretary Kristi L. Noem blames congressional Democrats for the government shutdown and any related travel delays, citing the political nature of its content, according to local authorities.

Officials that oversee airports in Buffalo, Charlotte, Cleveland, Los Angeles, Phoenix, Portland and Seattle said the video could violate internal policies that bar political messaging or contravene state or federal laws that prohibit the use of public resources for political activity.

“We believe the Hatch Act clearly prohibits use of public assets for political purposes and messaging,” said Molly Prescott, a spokesperson for the Port of Portland, which operates Portland International Airport.

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