Why Was Joe Biden’s Niece Fighting With Her Roommate This Morning at 9 a.m.?

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Caroline Biden, the vice-president's 26-year-old niece, was detained today at her Tribeca apartment after she "got physical" with police officers responding to a roommate dispute at around 9 a.m. Police seem to think the fight was rent-related, but roommate fights can sometimes be confusing and inscrutable to outside observers. Here are our best guesses for what Biden might have really been fighting with her roommate about at 9 a.m. on a Tuesday.