Kamala Harris switch scrambles Republicans as Trump resorts to insults

A week ago, former president was riding high, but now he faces vibrant, younger rival who hit the ground running

Donald Trump capped a tough week in which his Democratic opponents turned the tables, replacing aging Joe Biden with Kamala Harris as their top choice for president, by resorting to insults and extremism on the campaign trail.

A week ago, Trump was riding high on the iconic moment when he rose bloodied and with a defiantly raised fist from an assassination attempt, pulling away in the polls. Biden, meanwhile, was struggling to recover from his dire late June debate against the Republican nominee and an unconvincing performance in the days since.