Scratch beneath the surface of everyday American life and you find an increasingly polarised culture. Donald Trump is no longer in the White House, but the culture wars he inflamed are still raging. In a special edition of HARDtalk from New York, Stephen Sackur speaks to an influential conservative activist in the thick of the fight. Ryan Girdusky, the founder of the 1776 Project Political Action Committee, says America’s schoolchildren are being brainwashed about race and he’s out to stop it. What does it say about America that the classroom is now a political battleground?