Winfrey had barely heralded a “new day” following a sexual harassment watershed, before calls snowballed for one of America’s most famous women, a self-made tycoon born into poverty, to run for the highest office in the free world. Hollywood’s loathing of Trump and Democrats’ bafflement that a crass-talking reality star with no previous government experience could win the presidency have fuelled talk of, well, why not another television star, only one with the “right” politics?