evidence: Vice President Kamala Harris has spoken about joy on the campaign trail and at the Democratic National Convention in Chicago. But we found no instances of Harris saying the"strength through joy" phrase in her presidential campaign speeches. We also found no credible news articles about this phrase being her campaign slogan.esidential campaign., a man says,"I’m sure by now you’ve heard Kamala Harris running around the country, ‘Joy! We’re gonna bring back joy! I want you to Google ‘strength through joy. [...] Vice-presidential wannabes parade for the cameras, and Harris campaignIf you turned on your television this weekend — mainly, cable news, of course — you would have a difficult time not seeing it: a parade of Democrats vying, fairly overtly, to join Kamala Harris on the presidential ticket.