Summarize and humanize this content to 2000 words in 6 paragraphs in EnglishKair Starmer will have to offer ‘extraordinary’ concessions to get a tariff-free trade deal with the US, the White House has warned.The Prime Minister has repeatedly stressed that Britain is uniquely placed to strike an economic agreement that could soften the impact of Donald Trump’s global levies war.But Kevin Hassett, director of Mr Trump’s National Economic Council, yesterday told CNBC: ‘I think everybody expects the 10 per cent baseline tariff is going to be the baseline. And it is going to take some kind of extraordinary deal for the president to go below there.’Sir Keir said he was ‘very pleased’ to see Mr Trump suspend the imposition of some tariffs for 90 days.But he added: ‘The challenge hasn’t gone away and I don’t think this is a passing phase – we are living in a changing world.’The Prime Minister said officials were continuing to pursue a free trade deal.Privately, officials acknowledge it may be impossible to remove the 10 per cent tariff. Instead, work is focused on easing the 25 per cent tariffs on steel and cars and averting further levies on pharmaceuticals. The Prime Minister has repeatedly stressed that Britain is uniquely placed to strike an economic agreement that could soften the impact of Donald Trump’s global levies war Sir Keir said he was ‘very pleased’ to see Mr Trump suspend the imposition of some tariffs for 90 days Kevin Hassett, director of Mr Trump’s National Economic Council, yesterday told CNBC that the 10 per cent tarriff is the baseline levelMinisters are already facing pressure over reported concessions. These include watering down the impact of the digital services tax on tech billionaires, relaxing rules on artificial intelligence and cutting tariffs on some US agricultural products. Sir Keir said the deal under discussion would not be enough to deal with the fallout from the tariff war. ‘I am very clear in my own mind that that will not alleviate the challenge,’ he said. ‘It’s bigger than that – that’s why we’ve got to step up and turbocharge our economy.’Last week, Downing Street said Mr Trump’s decision to put the UK on the minimum 10 per cent tariff – half that of the EU – was a ‘vindication’ of the PM’s efforts to cosy up to Mr Trump.Britain is now facing the same tariff as the EU and the rest of the world, except China.But Sir Keir denied his approach had failed, saying: ‘I don’t think having a strong relationship with the US has given us no advantage whatsoever. We have got a very strong relationship on defence, security, intelligence sharing. No two countries are as closely aligned as ours.’Ministers fear Mr Trump could push ahead with tariffs of up to 25 per cent on the pharmaceutical industry despite his climbdown on wider tariffs on the rest of the world this week. Officials are continuing to lobby US counterparts over the issue. The life sciences sector is central to the Government’s growth strategy. The UK exports £8.8billion worth of pharmaceuticals to the US each year and is home to a number of American pharmaceutical factories.On Tuesday, Mr Trump said he would be ‘announcing very shortly a major tariff on pharmaceuticals’ aimed at forcing drug firms to relocate to the US. Shares in leading UK firms like AstraZeneca and GSK fell sharply in response. Last week, Downing Street said Mr Trump’s decision to put the UK on the minimum 10 per cent tariff – half that of the EU – was a ‘vindication’ of the PM’s efforts to cosy up to Mr Trump Tory MP Kit Malthouse, who is chairman of the all-party group on life sciences, said the UK is able to help the US fight against ailments including cancerGovernment sources said there were still fears the additional tariffs on pharmaceutical firms could go ahead. One said: ‘We have had no indication that anything has changed on pharmaceuticals. It remains a big concern because, if it does happen, it will definitely have an impact here.’But Tory MP Kit Malthouse, who is chairman of the all-party group on life sciences, said: ‘As a life sciences superpower, the UK is able to offer Americans hope in the fight against all sorts of awful ailments like cancer, neurodegenerative diseases and their battle with opioid addiction. Why on earth would you tax these scientific miracles at your own border?’Economists warned the UK would not benefit from Mr Trump’s climbdown. Morgan Stanley said it was making no adjustments to its UK forecasts, while former Bank of England rate-setter Michael Saunders told Bloomberg that Britain still faces both weaker GDP and lower inflation.‘The adverse growth effect is at least as bad as last week,’ said Mr Saunders, now an adviser at Oxford Economics. He added output will suffer as ‘trade policy uncertainty has risen because we don’t know what the tariffs will be’.