The Guardian is a newspaper. They are just covering the news.
Other outlets are covering this also, including conservative ones.
You are way too eager to find a conspiracy here… I promise you, this British newspaper isn’t run by and for American Democrats.
As far as I can tell, The Harris/Walz campaign hasn’t officially responded to this endorsement. Are you getting mad about stuff that hasn’t even happened?
Believe it or not, the Harris/Walz campaign doesn’t orchestrate endorsements. Anyone can endorse a candidate with or without that candidate’s knowledge, permission, or acknowledgement.
Harris may be getting the endorsement of old-school/moderate Republicans, but Trump has the endorsement of extremist/far-right Republicans and Neo-Nazis.
If you can’t pick a side here, that’s entirely your own moral failure.