evidence: 'I'm a knucklehead': Tim Walz says he 'misspoke' about Tiananmen Square visit [...] Gov. Tim Walz was asked by vice presidential debate moderators Tuesday about his past trips to China, after discrepancies arose about how many times he visited and whether he was there during the Tiananmen Square massacre. [...] Walz also once described being in Hong Kong in May 1989, during the student uprising that culminated in the Tiananmen Square massacre, the reporting from APM Reports notes — an assertion that is belied by newspaper accounts at the time.