evidence: Vice President Kamala Harris and former President Donald Trump praised their respective running mates -- Gov. Tim Walz and Sen. JD Vance -- as their campaigns worked to spin how well they performed at Tuesday night's vice-presidential debate. [...] But Walz struggled to explain why he had in the past "misspoke" about being in Hong Kong and witnessing the Tiananmen Square protests in the spring of 1989, despite the weekslong protest concluding in June, months before he traveled there. [...] In a play-by-play live commentary on social media, Trump painted Walz as appearing "nervous," incompetent and even "weird." Trump in particular seized on Walz struggling to answer for the alleged discrepancy in his visit to Hong Kong during the Tiananmen Square protests, portraying him as a liar.