模仿句子：But first a slanging match has broken out in the United States between Donald Trump, the frontrunner to become the Republican candidate for the presidency, and his rival Ted Cruz.

概况：特朗普早前指控克鲁兹父亲与杀害美国前总统肯尼迪的主嫌有关，克鲁兹3日出席竞选活动时形容对方是骗子、自恋者及恶霸。