US President Donald Trump will arrive in the UK this evening for his second state visit.

President Trump's State Visit to the U.K. faces political challenges as trade deals and controversies unfold.

Windsor Castle staff are setting the 50-meter-long mahogany table. Grooms are buffing the hooves of the horses that will pull the royal carriages. And the military honor guard is drilling to ensure every step lands with precision. Throughout the halls and grounds of the almost 1,000-year-old castle west of London,…