President Donald Trump speaks as he welcomes the Super Bowl champion Philadelphia Eagles NFL football team to the South Lawn of the White House.Even Reform UK voters are growing sick and tired of Donald Trump, according to a new poll marking his 100th day in office.The US president’s favourability has declined in Britain since his inauguration in January.But his fall in popularity is even more pronounced among Reform backers – who were previously his biggest supporters in the UK.According to the More in Common think-tank, when he re-entered the White House at the start of this year, Trump’s net favourability rating among all British voters was minus 36.With Labour voters that figure stood at minus 42, while with Tories it was minus 27.However, Reform UK voters gave him a net favourability rating of plus 31. Barely three months later, however, that figure has plummeted by 30 points to just plus 1.Among British voters as a whole, it has fallen by 8 points to minus 44.The findings may explain why Reform leader