There have been 123 African-Americans killed by police in 2016 alone, and Clinton ticked through many of their names.
Hillary Clinton ended her speech on Friday with a quote from the Book of Revelations.
Let's focus on what we already know deep in our hearts.
"Personally I'm disappointed, but I completely understand", said Stephanie Jirard of Carlisle, who was first in line and had been waiting since 2:15 a.m. for the rally.
The senseless, tragic deaths of two people in Louisiana and Minnesota reminds us how much more needs to be done.
Clinton called for national guidelines for law enforcement on the use of force, particularly lethal force.
Speaking in a video released early Friday evening, Trump said the shootings of the 12 officers, five of whom were killed, had "shaken the soul of our nation". "I'm going to be talking about white people", Clinton said on CNN. "But all these things can be true at once", and "surely we can all agree with those basic premises". Biden said that "those killed and wounded were protecting the safety of those who were peacefully protesting against racial injustices in the criminal justice system".
"Her challenge is to show she can cope with these issues and that she would bring change and would not be the same", said presidential historian Thomas Alan Schwartz. Over the past several months, Trump has repeatedly blamed President Obama for racially dividing the country, and he has been an outspoken defender of police officers, saying that many are afraid to do their jobs and that sometimes they have to be rough with suspected criminals. "A brutal attack on our police force is an attack on our country and an attack on our families".
President Obama said Americans “stand united with Dallas”Jonathan Ernst Reuters
"We must stand in solidarity with law enforcement, which we must remember is the force between civilization and total chaos", he said.
Trump said, "Racial divisions have gotten worse, not better".
Mr Brown and US Homeland Security Secretary Jeh Johnson said the gunman appeared to have acted alone, despite initial reports of a number of snipers.
In responding to the spasm of gun violence, Clinton has called for more regulations on the gun industry and has aligned herself with the Black Lives Matter movement, which campaigns against violence against African-Americans. Clinton is still expected to speak Friday afternoon in Philadelphia, where she is expected to address this week's shootings in Dallas, Baton Rouge and Minnesota.
When it comes to solving the problems, Clinton asked "white Americans" to put themselves in the shoes of "black Americans", and imagine being profiled, followed around stores or anxious every time their own children left home.
Soon after the shooting that killed five police officers and injured seven more in Dallas, Donald Trump's Virginia campaign chairman took to social media to blame Hillary Clinton and Lt. Gov. Ralph Northam for the killings.
"Donald Trump isn't a typical Republican candidate, and Mitt Romney and John McCain by and large were", Mook said in a telephone interview with the Tampa Bay Times, after attending a field office opening ceremony in Miami-Dade County Saturday.