The debate began with a rendition of the national anthem by a Hispanic youth (Sebastien de la Cruz) dressed in Mexican mariachi attire. It seems like this was a message to Trump who has been very vocal about illegal immigrants, especially those who come from Mexico undocumented.
This debate seemed too focused on immigration and even began with questions on Donald Trump in regards to whether he was racist or not. Both candidates did not outright say he was, but gave examples of his statements and behaviors. The candidates also attacked each other on immigration with Clinton charging that Sanders supported 'Minutemen vigilantes' who were hunting down immigrants. Sanders countered that Clinton was not well informed and did not listen to his speeches.