'Ready to rumble': Trump holds Iowa campaign rally more akin to victory lap

It was a melancholy farewell. Three years ago this week, Donald Trump departed on Air Force One for the last time as Frank Sinatra's My Way blared from loudspeakers. The outgoing US president was defeated, disgraced and seemingly down and out. Amid the snowy plains of Iowa, however, Trump is set to pull off one of the most improbable of all political comebacks. On Sunday, he held a campaign rally more akin to a victory lap in a state where Republican caucus-goers look certain to back him for a swift return to the White House. Despite freezing tempeatures and icy…