Trump and Biden pick up easy victories across the US in Super Tuesday primaries – as it happened

Trump and Biden pick up most delegates of any state in key win; Haley notches up surprise victory by beating Trump in Vermont

• Live results and delegates tracker
• Full report: Haley wins surprise Vermont victory as Biden and Trump dominate

Over at CNN, Ronald Brownstein has an analysis piece which looks a little at the potential weakness of Donald Trump support away from his core base. Brownstein writes:

[Trump's] performance so far reflects his success at transforming the Republican Party in his image. He's reshaped the Republicans into a more blue-collar, populist and pugnacious party, focused more on his volatile blend of resentments against elites and cultural and racial change than the Ronald Reagan-era priorities of smaller government and active global leadership that former South Carolina Gov Nikki Haley has stressed.

But while the primaries have underscored Trump's grip on the GOP, they have also demonstrated continued vulnerability for him in the areas where he has labored since he first announced his candidacy in 2015 - particularly among the white-collar suburban voters who mostly leaned toward the GOP before his emergence. The early 2024 nominating contests have shown that a substantial minority of Republican-leaning voters remain resistant to Trump's vision.