Presidential candidate US Vice President Kamala Harris has turned to personal attacks on former US President Donald Trump in an attempt to boost her own chance at the White House. The attacks follow the Harris campaign's brutal condemnation of Trump's personal attacks on her. In a post on X, Harris accused, "Donald Trump makes promises and always fails to deliver." In fact, during his presidency, Trump fulfilled several of his campaign promises. Another tweet claimed: "Donald Trump is increasingly unstable and unhinged. He is seeking unchecked power in his second term, he has promised retribution and jail time for his...