US politics: Who is Tim Walz, Kamala Harris’ ...

The launch of a new chatbot by Chinese artificial intelligence company DeepSeek triggered a plunge in US tech stocks as it appeared to perform as well as OpenAI’s ChatGPT and other AI models but using fewer resources. Helen Pidd speaks to Robert Booth, the Guardian’s UK technolog ...  Show more

Around the world, soaring inflation has pushed voters to turn on incumbent governments. But one country bucked the trend – Mexico, where the leftwing Morena party recorded a landslide victory. The key to it’s success? A policy platform built on minimum salary rises, labour reform ...  Show more

Joe Biden, Bill Clinton and Hillary Clinton have endorsed Kamala Harris for the Democrat nomination for President. 
 
But there are notable names – including Barack Obama – who haven’t given her their support so far.  
 
Is the Vice President significantly mor ...  Show more

Endorsements for Harris to be the new Democratic presidential nominee have come thick and fast. But without Joe Biden can the Democrats win the US election? s. Help support our independent journalism at theguardian.com/infocus 

President Joe Biden announced Sunday he is ending his re-election bid and is throwing his support behind Vice President Kamala Harris to be the Democratic Party’s nominee in November. It’s the latest bombshell shakeup to this year’s presidential race. Biden said in a statement, “ ...  Show more

Donald Trump and friends try out new lines of attack on Kamala Harris as they struggle to confront her momentum—and the new reality of the race. JD Vance still can't figure out how to move past his "childless cat ladies" comments, and Joe Biden introduces a slate of Supreme Co ...