President Donald Trump is swinging the axe at government waste, eyeing a blockbuster sell-off of 443 federal properties spanning 47 states, DC and Puerto Rico. The move, aimed at gutting the bloated federal workforce and the pricey buildings they occupy, could dump nearly 80 million square feet of commercial space — 12 times the Pentagon’s footprint — onto the market. The General Services Administration (GSA) dropped the staggering list of “non-core” assets on Tuesday, spotlighting a haul that could save taxpayers a cool $430 million a year in upkeep costs,...