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Republican Ben Carson Tuesday called for the firing of a Ted Cruz campaign staffer who said the retired neurosurgeon was planning to drop out. "I think whoever is responsible for blatant lying should be dismissed, absolutely. Unless that kind of behavior is acceptable in your campaign culture," Carson told CNN's Jake Tapper on "The Lead." One day after winning the Iowa caucuses, Cruz issued an apology to Carson after his staff falsely told Iowa caucusgoers that Carson planned to quit the race, calling it a "mistake."