Pink has mocked Donald Trump on social media after a spectacularly poor turnout at his re-election campaign rally in Oklahoma.The event took place in Tulsa yesterday (June 20), with Trump previously claiming that one million people had registered for tickets for the rally.But photographs and footage of the 19,000-capacity BOK Center clearly show thousands of empty seats across the venue – prompting Pink to compare the event to one of her past gigs there.“I think I sold that same place out in