Immigration has been a weakness for Democrats this cycle
Democrats are trying to make progress with voters when it comes to immigration and border security.
A recent ABC News poll found Donald Trump retains the upper hand on the issue, keeping the race a closely contested one.
Trump leads Harris by 10 points in trust to handle the immigration situation at the U.S.-Mexico border, though he had led by 14 points in July.
At the DNC, speakers are bashing Trump for encouraging congressional Republicans to kill the bipartisan border deal negotiated earlier this year.
"He is a self-serving man," Javier Salazar, the sheriff of Bexar County, Texas, just said on stage. "Just like when he killed the border bill, he just made our jobs harder."