Jasper, who is currently undecided about the election, showed up with Jemma. His face was pretty neutral the whole time, listening closely to everything Jack said. Mostly he just looked like he was considering everything as best he could and always politely clapped when it was expected.
Anyone that asked him about who he'd be voting for would have received an answer about how he didn't like to make those decisions before the debates happened. But he thought Jack gave a good speech.