Timothy Garton Ash
"A second Trump presidency would be a disaster for the US. It would also be a catastrophe for Ukraine, an emergency for Europe and a crisis of the west. If Biden steps aside now, democrats everywhere will honour him"

https://www.theguardian.com/commentisfree/2023/sep/29/unless-joe-biden-stands-aside-the-world-must-prepare-for-president-trump-20?utm_term=6516f48a531efb5b0c17c6b753530147&utm_campaign=BestOfGuardianOpinionUK&utm_source=esp&utm_medium=Email&CMP=opinionuk_email 

 @ecfc3044 Seems a huge gamble to change candidates without any data suggesting that there's anyone who'd do better than Biden.