1. Trump’s ‘go back’ attacks

In July, President Trump took to Twitter to tell four Democratic congresswomen to “go back” to where they came from — a phrase with a racist and xenophobic history.

Three of those congresswomen, all minorities — Reps. Ayanna Pressley (D-Mass.), Rashida Tlaib (D-Mich.) and Alexandria Ocasio-Cortez (D-N.Y.) — were born in the United States. Rep. Ilhan Omar (D-Minn.) fled civil war in Somalia and came to the United States as a child refugee, later becoming a naturalized citizen.

Things soon took an even uglier turn when supporters at a Trump rally that month broke out in a “Send her back!” chant directed at Omar.