Cokie Roberts, the daughter of politicians and a pioneering journalist who chronicled Washington from Jimmy Carter to Donald Trump for NPR and ABC News, died Tuesday of complications from breast cancer. She was 75. ABC broke into network programming to announce her death and politicians including former presidents George W. Bush and Barack Obama offered sympathy. Roberts devoted most of her attention to covering Congress, where her father Hale Boggs was a House majority leader who died in 1972 when his plane went missing over Alaska. Her mother, Lindy Boggs, took over his Louisiana congressional seat and served until 1990, later becoming ambassador to the Vatican. Roberts co-anchored the ABC Sunday political show “This Week” with Sam Donaldson from 1996 to 2002. She was most proud professionally of a series of books about women in Washington.