Echo chamber election: How viral can hate go in US presidential race?

Eight years ago, the mood on the campaign trail was so toxic that US First Lady Michelle Obama told voters "when they go low, we go high." In 2024, with a campaign that's too close to call, it feels even darker. To borrow the title of a famous book about the 1972 election, there is plenty of fear and loathing on the campaign trail in the homestretch of a tight US presidential race marred by character assassinations and racist tropes.