The new Republican head of the U.S. Federal Communications Commission promised “light-touch” regulation of areas such as the internet, a dramatic shift away from the Obama administration’s approach to telecommunications oversight. Ajit Pai, whom President Donald Trump named in January to chair the FCC, said at the Mobile World Congress in Barcelona that the agency made a “mistake” in 2015 when it adopted landmark “net neutrality rules” reclassifying internet service like a public utility.