MSNBC’s Mika Brzezinski was surprised by Tim Walz’s response when challenged on his past claims about Tiananmen Square. The Minnesota governor has claimed to have been in Hong Kong at the time of the 1989 massacre, when in fact he was there weeks later, and “Morning Joe” panelists agreed that Walz seemed unprepared to explain the inconsistencies in that account and came off as flat at other points during the debate. “I was disappointed,” said panelist Elise Jordan. “I felt like the reasons that Kamala Harris chose Gov. Walz didn’t really come out last night, the Gov. Walz who was joking and wh…