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Nancy Mace went off the rails at a South Carolina airport this week, launching into a foul-mouthed tirade against cops for what she claims was pure incompetence, according to a police report.

The fireworks began Thursday night at the Charleston International Airport, where cops said Mace was being chauffeured in a white BMW to catch a flight, but things soon took a wrong turn. AP

Police said 3 officers were waiting in the ticketing vestibule to escort Mace from the curb to her flight gate upon her arrival. While they waited, the officers were allegedly informed Mace was running 10 to 15 minutes late.

Then they learned Mace had rolled up to a Transportation Security Administration entrance in a different part of the airport, according to the report.

When cops got to the TSA c

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