Donald Trump sharpens his weapons against new rival Kamala Harris

Less than 100 days before the US presidential election, Donald Trump shifts electoral strategy to target new opponent Kamala Harris after Joe Biden's sudden withdrawal, forcing a rapid recalibration by Trump and the Republicans. Struggling to settle on an effective line of attack, Trump's broadsides against Harris have become increasingly extreme and untethered to reality. Traditional attacks have been focused on her policy pivots. Harris, meanwhile, erases Trump's lead in key battleground states, as both candidates ramp up campaign events in various states.