But hours later, at a town hall event in South Carolina, the billionaire hotel developer was more conciliatory.
Republican voters in the US state will make their presidential choice in days.
Mr Trump leads the South Carolina polls and he took to a stage in Columbia on Thursday evening to answer questions on national television.
When asked about his row with the Pope, he said he wouldn`t describe it as a fight, although he later said he didn`t like fighting with him.
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