The document details Stephen Miller's ascent within the Republican Party as a key figure in the anti-immigration movement, tracing his rise from a college graduate to a senior advisor to President Trump. It highlights the transformation within the party's stance on immigration over the years, particularly after the September 11 attacks and the shift away from pro-immigrant sentiments. Additionally, it examines Miller's controversial background and the broader cultural and political forces that have shaped immigration policy in the U.S.