WASHINGTON: Receiving dignitaries at his Florida estate and courting leaders shunned elsewhere as autocratic, Donald Trump is increasingly leading a shadow diplomacy diametrically opposed to US President Joe Biden. The Republican mogul, in the unusual role of a former president running again for the top job, has turned to trusted faces both at home and abroad and sought to scuttle some of Biden's top foreign policy priorities. Trump's supporters have for months held up billions of dollars in