President Joe Biden will warn that Donald Trump and his "extremist" allies pose a danger to US democracy in a speech Thursday, sharpening his attacks on his likely Republican challenger in the 2024 election.
The Democrat will say in the battleground state of Arizona that there is a "threat to our institutions, to our constitution itself" from the right-wing populist, who is neck-and-neck with Biden in the polls, despite facing dozens of criminal charges.