Video of a deadly stabbing on Charlotte’s light-rail system — in which a male passenger appears to slash the neck of a passenger — has stunned viewers across the nation.

It has also sparked intense political debate across all levels of government from Charlotte to Raleigh to Washington and beyond.

The incident has led to questions about decisions made by officials in North Carolina’s criminal justice system. Charlotte’s mayor and transit leaders have come under fire. And it’s become a new storyline in what is expected to be a hard-fought Senate race in this battleground state.

Everyone from President Donald Trump to the state auditor has weighed in.

Here are answers to some basic questions about the incident — and why it’s receiving so much attention from political leaders.

Q: What

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