Two killings in the United States highlight the tragedy of American politics, an observer says

Shock, disbelief and sympathy.

Those were just some of the reactions Chinese social media users expressed in the aftermath of two murders in a politically polarised United States.

The two attacks have become the latest flashpoints for broader debate on political violence, crime control and immigration in the US where both political parties are aggressively trying to shape the public narrative ahead of midterm elections next year.

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