Former President Donald Trump is out of his depth facing the prospect of running against Vice President Kamala Harris instead of President Joe Biden, wrote his niece Mary Trump in her latest email blast — and he’s “terrified.” Trump “hates being laughed at,” she wrote. “Donald also hates women (especially strong women) and minorities, so you can see why current Vice President and presidential candidate Kamala Harris terrifies him to the point of incoherence. He says she’s ‘crazy.’ His childish nickname for her is ‘laughing Kamala’ because she feels joy, and joy is something he has never experi…