Chris Christie and Mike Pence have become the latest to enter the Republican primary.  Despite his legal woes Donald Trump commands a huge lead in the early polling and the man thought most likely to challenge him, Ron DeSantis, has been stumbling. Can anyone beat Trump to the nomination? Congressman Bob Good explains why he’s backing DeSantis over Trump. Jon Ward, author of “Camelot’s End”, remembers an early frontrunner who lost a big lead. And The Economist’s James Bennet surveys the field.  John Prideaux hosts with Charlotte Howard and Idrees Kahloon.You can now find every episode of Checks and Balance in one place and sign up to our weekly newsletter. For full access to print, digital and audio editions, as well as exclusive live events, subscribe to The Economist at economist.com/uspod. Hosted on Acast. See acast.com/privacy for more information.

He is expected to be charged for failing to return classified documents and obstructing justice. The former president denies wrongdoing, and any possible convictions are still a long way away, but how does this affect his election campaign? Wildfires raging across Canada are choking New Yorkers. We take a closer look at the air quality data. And Putin’s alleged birth mother dies in Georgia. For full access to print, digital and audio editions of The Economist, try a free 30-day digital subscription by going to www.economist.com/intelligenceoffer Hosted on Acast. See acast.com/privacy for more information.

For over three decades, the people most excited about Nvidia’s chips have been gamers. They used its graphics cards to render games in super-high definition. But over the last 15 years Nvidia has slowly established itself as the go-to provider of chips and software to the booming artificial intelligence space. Now it is investors that are paying attention—Nvidia’s market cap has almost tripled this year, briefly soaring above $1trn in late May. On this week’s podcast, hosts Alice Fulwood, Tom Lee-Devlin and Mike Bird explore the astonishing rise of Nvidia. The Economist’s Guy Scriven explains how the AI boom made the Californian chip maker into a $1trn company. Stacy Rasgon, an analyst at Bernstein Research, charts the company’s “30-year journey to overnight success” and Pierre Ferragu from New Street Research tells them that Google and Amazon have their sights on the chip market.Sign up for our new weekly newsletter dissecting the big themes in markets, business and the economy at www.economist.com/moneytalks For full access to print, digital and audio editions, subscribe to The Economist at www.economist.com/podcastoffer Hosted on Acast. See acast.com/privacy for more information.

The country’s military is renowned for political overreach. Now, its leaders are taking on former prime minister Imran Khan. Is violent unrest on the horizon? Why a new Polish law to rid the country of Russian influence could threaten its democracy. And, the Japanese are taking a new approach to funerals.For full access to print, digital and audio editions of The Economist, try a free 30-day digital subscription by going to www.economist.com/intelligenceoffer Hosted on Acast. See acast.com/privacy for more information.

Many of the world’s most important urban areas are on coastlines or rivers, putting them at risk of rising sea levels. Rapid urbanisation and climate change are conspiring to make this threat more urgent. How can cities adapt to avoid catastrophe? The Economist’s Benjamin Sutherland explores how well new flood defences work in Venice and why Venetians are pondering raising the city’s foundations. Alizée Jean-Baptiste, The Economist’s Asia podcast producer, visits Jakarta, to investigate why Indonesia’s government is choosing to build an entirely new capital city, in a new location, in their attempt to adapt to future flooding. Plus, Catherine Brahic, our environment editor, explores the political and economic considerations needed to save cities. Alok Jha, The Economist’s science and technology editor, hosts.For full access to The Economist’s print, digital and audio editions subscribe at economist.com/podcastoffer and sign up for our weekly science newsletter at economist.com/simplyscience. Hosted on Acast. See acast.com/privacy for more information.