Donald Trump booed as the 1st sitting US president at a regular-season NFL game since Carter in 1978

+8 National News Donald Trump booed as the 1st sitting US president at a regular-season NFL game since Carter in 1978 By HOWARD FENDRICH - AP National Writer 6 mins ago President Donald Trump has become the first sitting president in nearly a half-century at a regular-season NFL game. He attended the Washingto…