Billionaire businessman and Republican presidential hopeful Donald Trump has been flying around on his campaign trail in an unregistered aircraft that makes its insurance invalid. The Donald failed to pay the $5 registration fee back in January and has been using his sleek Cessna jet for several months on his campaign stops in places like Sioux City, Iowa, and Jackson, Mississippi without bothering with legal requirements to register the plane. CNBC reports: Records kept with the Federal Aviation Administration show the aircraft’s registration lapsed on Jan. 31. Laura J. Brown, a spokeswoman for the Federal Aviation Administration, confirmed that the plane’s registration was not in good standing and said the owner had not renewed it. With few exceptions, aircraft must be registered in order to fly. Mr. Trump’s plane could be grounded for several days, or even months, while the issue is sorted out. In the event of an accident, the company that insures the plane could use the expired registration as a reason to decline any claims. The F.A.A. could also fine or assess other penalties against the owner and/or operator; Mr. Trump owns the plane through a limited liability company. Though it is unlikely that the F.A.A. would [...]