Marion McKeone: Debate on senility set bar so low for Biden that Trump is now on back foot

And they’re off. The 2024 presidential campaign is officially under way, with the opening salvo fired by US President Joe Biden during his annual State of the Union address. There are few places Biden is more at home than on Capitol Hill.

Fifty-two years since, by his own admission, he first gazed slack-jawed at its vast rotunda and marble statues, Biden launched his bid for a second term in front of an implacably divided House ...