Washington (AFP) – US Sunbelt mayors warned Sunday that their cities are at risk of being overwhelmed by a surge of coronavirus cases as they pushed back against US President Donald Trump’s attempt to minimize the gravity of the spreading virus.COVID-19 has been raging for weeks across southern and western states. Florida has registered 10,000 new cases on some days. Arizona has seen record hospitalizations. And intensive care units in Houston, Texas are operating near maximum capacity.With President Trump continuing to play down the disease — eschewing a mask, continuing to address large gat…