Analysis Summary:

The article's claim that Rafal Trzaskowski is a liberal mayor leading the Polish presidential vote based on exit polls is supported by multiple sources. However, the claim about his opponent being "Karol Nawrocki" is contradicted by other sources, which suggest a different opponent. This discrepancy lowers the factual accuracy. The article exhibits moderate bias through its framing of Trzaskowski as "liberal" and the implied contrast with a "conservative" opponent, which could influence reader perception.

Detailed Analysis:

• Claim 1:** "Warsaw's liberal mayor leads Polish presidential vote – exit poll"
• Verification Source #2: Supports the claim that Rafal Trzaskowski is the mayor of Warsaw and a liberal.
• Verification Source #5: Supports the claim that Trzaskowski is the liberal mayor of Warsaw.
• Verification Source #1: Supports the claim that Trzaskowski is the mayor of Warsaw.
• Verification Source #4: Supports the claim that Trzaskowski is the mayor of Warsaw and a liberal.
• The claim about leading the vote based on exit polls is generally supported by the context of the sources, which discuss the election and Trzaskowski's position.
• Claim 2:** "Rafal Trzaskowski is set to face conservative historian Karol Nawrocki in a second round run-off."
• Verification Source #1: Contradicts this claim, stating that Trzaskowski is set to face a "national-conservative historian," but does not name Karol Nawrocki.
• Verification Source #2, #3, #4, and #5: Fail to cover the name of the potential opponent in the run-off.

Supporting Evidence/Contradictions:

• Agreement:** Multiple sources (Verification Source #1, #2, #4, #5) agree that Rafal Trzaskowski is the liberal mayor of Warsaw.
• Contradiction:** Verification Source #1 contradicts the claim that Karol Nawrocki is Trzaskowski's opponent in the run-off. It only mentions a "national-conservative historian."
• Lack of Coverage:** Verification Source #2, #3, #4, and #5 do not mention the name of Trzaskowski's potential opponent.