U.S. President Donald Trump on Monday attacked Britain’s public health-care system in comments that are likely to call his much-delayed visit to the country further into doubt. The Democrats are pushing for Universal Health Care while thousands of people are marching in the U.K. because their system is going broke and not working,” he wrote in an early morning tweet. Dems want to greatly raise taxes for really bad and non-personal medical care. No thanks!” The tweet came after thousands of people marched through central London on Saturday in support of the National Health Service, which is straining under the weight of winter demand. NHS staffing levels have been in crisis for months, an issue made worse by a winter flu outbreak. Despite its current woes, the National Health Service (NHS) is a revered institution and Mr. Trump’s comments are likely to stoke resentment.