Limbaugh Gives 'Right On' to Romney Birther Joke, Says Romney is 'Test-Driving' Line About Obama's Birth Certificate Written by Evan Whitbeck & Laura Keiter Published 08/24/12 5:32 PM EDT CD-MMM08242012-1026 Audio file Earlier today, Republican presidential nominee Mitt Romney echoed the right-wing media's obsession with President Obama's birth certificate and Rush Limbaugh was quick to praise him for it.