[...] that he's the GOP presidential nominee, who needs to appeal to the whole country, some observers say he's turning to tried-and-true code words to gin up racial animosity and fear among America's white voters. Trump "didn't get on stage and issue a bunch of racial epithets," said Emory University political scientist Andra Gillespie, who watched his acceptance speech at the Republican National Convention. In addition to appealing to whites' racial anxieties about crime, the celebrity businessman added immigrants to the mix and said refugee families with unknown backgrounds threaten to transform the nation unless drastic measures are taken, Lopez said. Trump has been criticized for his racial language since the beginning of his campaign, which started with his declaration that the Mexican government is "forcing their most unwanted people into the United States," including drug dealers and rapists. When they hear that phrase, anxious white voters fill in any picture they want in their minds, imagining cutting crime or pushing back against social causes like the women's movement, said Michael Flamm, Ohio Wesleyan University history professor and author of In the Heat of the Summer: The late political operative Lee Atwater, manager of George H.W.