Donald Trump began his campaign in June 2015, but his events have increasingly become characterised by violence.
It culminated in Chicago this weekend, with a large brawl at a cancelled rally for the Republican candidate, and with clashes persisting throughout his Saturday events.
INSIDER takes a look into the cause of this violence, and what it says about Trump as a candidate.
Story by A.C. Fowler and Allan Smith, and editing by A.C. Fowler and Stephen Parkhurst
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