Michigan primary: On Twitter, Mitt Romney supporters seem hopeful for a win Mitt Romney's victory in Arizona, paired with a slight lead in Michigan with more than half of precincts reporting, has supporters of the GOP contender getting happy on Twitter. The joyful tweets -- many about the news out of the Grand Canyon state -- outnumber those expressing anger about Romney 2 to 1, according to social sentiment analysis by San Francisco-based Kanjoya. Even before the projected win in Arizona, Romney, who has stumbled in what had appeared to be a clear shot to his party's nomination, had seen a rise in positive tweets, Kanjoya officials said. MOOD METER: Track social sentiment about the candidates What was driving the earlier feeling? In part, Kid Rock's endorsement and the promise of concert with the Detroit rapper. "If Mitt Romney wins the #GOP nomination, I look forward to seeing some uncoordinated celebratory dancing to Kid Rock's 'Born Free,'" tweeted MPongcoIf. Kanjoya uses a computer algorithm to assess emotional language. The tool, derived from the Experience Project, is based on language analysis of of more than 14 million personal stories, with their associated emotions. The company is tracking emotions they define as joy, surprise, anger, sadness and fear relating to the remaining Republican presidential hopefuls: Romney, Rick Santorum, Newt Gingrich and Ron Paul. Roughly 40% of the tweets Kajoya is capturing qualify as emotional in their algorithm. But even as some celebrated Romney's fifth win -- remember Iowa, initially the slimmest of wins for Romney shifted to Santorum after the final tallies came in -- other remained disgruntled. After the polls closed in Michigan, Kanjoya found that sadness in tweets connected to Romney increased 15%. "Main point being his lack of conservatism," said Kanjoya project manager Kumar Garapaty. Among the tweets placed into the "sad" category by Kanjoya: @RomneyTruth: Why is it that in a party that is overwhelmingly conservative, we cannot get a conservative candidate? #Willard #Romney. "Joe Scarborough: "Conservative Leaders are Telling Me "They'd 'Rather Lose' Than Elect #Mitt #Romney" Read more: What sentiment analysis can and cannot tell us about the GOP race