US President Donald Trump was caught on camera Tuesday responding obscenely to a heckler during a visit to an auto plant in Michigan, according to a video circulating on social media.During a tour of the Ford F-150 factory in Detroit, Michigan, Trump is seen on an elevated walkway overlooking the factory floor dressed in a long black overcoat.After some shouting, Trump appeared to point at the heckler on the factory floor, scowling and saying a few choice words, before raising a middle finger.For all the latest headlines, follow our Google News channel online or via the app.The heckler has not been identified, but White House spokesman Steven Cheung told AFP they got what they deserved.“A lunatic was wildly screaming expletives in a complete fit of rage, and the President gave an appropriate and unambiguous response,” Cheung said.The heckler seemed to shout, in part, “pedophile protector,” TMZ reported.The 79-year-old Republican’s second term has been dogged by demands to release the