evidence: Three weeks ago, just days after being formally chosen as the Democratic presidential nominee, Kamala Harris was pressed on her plans for a sit-down interview. [...] Barack Obama and Joe Biden sat for an interview with 60 minutes after Mr Biden was selected as the vice-presidential nominee in 2008. Eight years later, Hillary Clinton and her running mate Tim Kaine did the same. For Ms Harris and Mr Biden in 2020, they picked ABC’s 20/20. And less than a week after Trump announced JD Vance as his running mate, the pair were jointly interviewed on Fox. But since Mr Biden passed the torch to her late last month, Ms Harris has limited most of her engagement with the press to scripted and highly-controlled environments. Her last formal sit-down interview was on 24 June, more than two months and a political lifetime ago.