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- Donald Trump reportedly called Milwaukee a "horrible city."
- The former president is set to be formally crowned the GOP's presidential nominee there in July.
- Republicans offered a variety of explanations for Trump's reported remark.
Former President Donald Trump on Thursday reportedly insulted Milwaukee, the site of the Republican National Convention in just a few weeks.
"Milwaukee, where we are having our convention, is a horrible city," Trump told House Republicans during their closed-door meeting, according to PunchBowl News.