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David Sacks, an entrepreneur and venture capitalist, will host Florida Governor Ron DeSantis and Tesla CEO Elon Musk in an audio chat on Twitter Spaces on Wednesday (24 May) where Mr DeSantis is expected to announce his campaign for 2024 president. Mr Sacks, 50, is a longtime friend of Mr Musk and supporter of Mr DeSantis. Though Mr Sacks’ name is not as prominent as other tech-industry giants, the entrepreneur has a long history of leading and investing in major companies like PayPal, Yammer, Facebook, Airbnb and more. In more recent years, Mr Sacks has become a major donor to political campaigns for individual Republicans like JD Vance and Mr DeSantis. What experience does Mr Sacks have? Mr Sacks – who was born in Cape Town, South Africa in 1972 and moved to Tennessee with his family as a child – was the Chief Operations Officer (COO) and head of product for PayPal from 1999 until 2002. He has been dubbed part of the “Paypal Mafia”, a group of former PayPal employees who went on to have successful tech companies- like Mr Musk. In 2008, he founded Yammer which became one of the fastest-growing software-as-a-service companies to exist. In 2012, Yammer was acquired by Microsft for $1.2 bn. Mr Sacks co-founded the venture capital firm Craft Ventures in 2017, where he remains a partner. He also has the podcast All-In alongside fellow entrepreneurs Chamath Palihapitiya, Jason Calacanis and David Friedberg. Last year, Mr Sacks was widely reported to be helping out his longtime friend, Mr Musk, behind-the-scenes when his fellow South African-born friend acquired Twitter. What does Mr Sacks believe in? Like Mr Musk, Mr Sacks says he is a proponent of free speech. In a blog post on Medium in 2021, Mr Sacks criticised big tech social media platforms for permanently banning politicians. His belief in free-speech was echoed more recently in an interview with conservative personality Benny Johnson. Mr Sacks accused the media of not allowing anti-vaccine activists and Democratic presidential candidate Robert F Kennedy Jr to speak freely and questioned critics’ justification of saying Mr Kennedy was spreading misinformation. The entrepreneur also expressed support for Tucker Carlson after he was unexpectedly fired from Fox News. Mr Sacks has also been an outspoken critic of US policy towards Ukraine following the Russian invasion that began in February 2022. In a piece for The American Conservative last year, Mr Sacks proposed a peaceful end to the war which included holding referendums on the future of Donbas and Crimea, both of which were illegally occupied by Russian forces in 2014. On Twitter, Mr Sacks is vocal in criticising the US for its involvement in the Ukraine-Russia conflict and has repeatedly clashed with critics of Vladimir Putin, including former US ambassador to Russia Michael McFaul. In October Mr Musk retweeted an article Mr Sacks wrote for Newsweek in which he argued that continued military support for Ukraine could lead to “Woke War III”. The article itself was a response to the backlash Mr Musk received over a Twitter poll suggesting a peace deal which would strongly favour Russian interests. In his Newsweek article, Mr Sacks wrote: “There will be no peaceful resolution to this conflict that America doesn’t at least have a hand in negotiating, and we should be leading the effort. Instead, we’ve been deferring to the Ukrainians and their maximalist demands, upping the sanctions on Russia as Putin ups his rhetoric against the West.” While he has been criticised for his outspoken views despite lacking a foreign policy background, he has argued that his lack of expertise is actually an advantage: “Not being a member of the MIC [military industrial complex] is clearly an advantage in understanding the conflict.” What political candidates has Mr Sacks supported? Since the 1990s, Mr Sacks has supported both Republican and Democratic candidates according to OpenSecrets. His largest donations have gone toward the PAC supporting GOP Ohio Senator JD Vance, the conservative Purple Good Government PAC, Democratic California Governor Gavin Newsom and the Republican National Committee. Over the last two years, Mr Sacks has expressed vocal support for Mr DeSantis on Fox News and Twitter as well as donated to his political campaign. Read More Ron DeSantis to launch 2024 presidential bid on Twitter with Elon Musk Can the chaos from Silicon Valley Bank's fall be contained? Casey DeSantis gives cheeky response to reports husband is launching 2024 campaign

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Self-conscious people may suck in their stomachs - but doing so can be unhealthy. Adam Taylor, Professor and Director of the Clinical Anatomy Learning Centre, Lancaster University, has explained that the habit can create abdominal imbalance and all sorts of problems. In an article, he explained: "This can lead to a condition called 'hourglass syndrome; – a detrimental change in the structure of the abdominal wall, which may cause a visible crease to form in the mid-abdomen. Not only that, but this change can also have a knock-on effect on the internal organs and other parts of the body if left untreated." He added: "When we suck our stomach in it causes our rectus abdominis (commonly referred to as our "six-pack" muscles) to contract. But since we tend to store more fat tissue in our lower abdomen, the muscles at the top of the stomach tend to be more active. This creates a fold or crease in the abdomen over a long period, with the belly button being pulled upwards. "Sucking the stomach in places greater pressure on the lower back and neck. This is because they now have to compensate for changes in core stability." Sign up to our free Indy100 weekly newsletter He also said it may lead to changes in breathing capacity, though said more research needs to be done, and said sucking in the abdomen also puts strain on the pelvic floor which could cause incontinence. Fortunately, hourglass syndrome is reversible through exercises that strengthen core muscles like planks or bridges, he explained. And he also said the condition develops over weeks of consistently sucking in the stomach. "So occasionally sucking the stomach muscles in is not likely to cause problems," he said. Who knew it could have so many bad effects? Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

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