The presidential candidate who once promised to run a "joyful" campaign appeared overcome by frustration this weekend, amid poor polling figures and dwindling campaign funds. Not long ago, he was calling himself a “joyful tortoise”. But over the weekend the image Jeb Bush, once presumed heir to the Republican nomination for the White House, had insisted his campaign present of calm, cheerful optimism finally disappeared. A day after being forced to slash his staff, a rattled Mr Bush took to the stage on Saturday night at a rally in what should be safe territory for him, the staunchly Republican state...