Analysis Summary:

The article's claim that political violence is becoming "almost routine" is subjective and difficult to verify definitively with the provided sources. While the sources confirm the existence of school shootings and efforts to prevent violence, they don't directly address the frequency or normalization of political violence specifically. The article exhibits moderate bias by framing political violence as increasingly common without providing concrete data to support this assertion.

Detailed Analysis:

• Claim:** "Threats and violent acts have become part of the political landscape, still shocking but somehow not so surprising."
  • Verification Source #1, #2, #3, #4, and #5: These sources focus on school shootings and violence prevention strategies. They do not directly address the broader claim of political violence becoming routine.
• Analysis: The claim is not directly verifiable using the provided sources. While the sources acknowledge the existence of violence, they don't support the assertion that it is becoming "routine" in the political landscape. This is a subjective assessment.
• Internal Knowledge: Without specific data on political violence trends, it's difficult to assess the accuracy of this claim. News reports and studies on political polarization could potentially support or contradict this, but are outside the scope of the provided sources.

Supporting Evidence/Contradictions:

• The provided sources focus primarily on school shootings and violence prevention (Verification Source #1, #2, #3, #4, #5).
• There is no direct evidence within the provided sources to support or contradict the claim that political violence is becoming "almost routine." The sources *fail to cover* this specific claim.
• The absence of data on political violence trends makes it difficult to assess the factual accuracy of the article's central claim.