DONALD TRUMP was yesterday facing questions about whether military chiefs fully back his handling of the anti-racism protests after an excoriating rebuke by his former defence secretary gained the support of a Republican senator. The US president tried to wave away a searing critique by Jim Mattis, his Pentagon chief until December 2018, by claiming he fired Mr Mattis – who resigned over Syria policy disagreements – and calling him “the world’s most overrated general”. However, Mr Mattis’s 640-word statement, which saw him argue Mr Trump was the only American president in history who tries to divide rather than unite...