GETTY Donald Trump has urged people to come together

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Republican Trump posted a video message on Facebook urging people to unite and stand together with police officers. The media mogul also pledged to make his country safe again. It came as the latest nationwide poll put him two points ahead of rival Hillary Clinton in the race for the White House. The Rasmussen poll found Trump ahead across the entire country, with 40 points to Mrs Clinton's 38.

In an impassioned, he said: “We must stand in solidarity with law enforcement, which we must remember is the force between civilisation and total chaos. “Every American has the right to live in safety and peace. “A brutal attack at our police force is an attack on our country and an attack on our families.”

Trump addressed the killings of two black men which sparked a public backlash. In the first incident on Tuesday, unarmed Alton Sterling, 37, was shot dead in Baton Rouge after being pinned to the ground by police officers. The following day, 32-year-old Philando Castile was in a car with his girlfriend when he was shot by an officer in Minnesota.

GETTY Donald Trump has pledged to make America safe again

An investigation into the shootings has been launched. It was at a protest march about the deaths in Dallas that Army veteran Micah Johnson shot five police officers dead and leaving a further seven wounded. Trump said: “Racial divisions have gotten worse, not better.

PA•GETTY Micah Johnson shot five police officers dead

“Too many headlines flash across our screens every day about the rising crime and rising death tolls in our cities. “Now is the time for prayers, love, unity and leadership. “Our children deserves a better future than what we’re making them live through today.

Dallas Shootings: Memorial Service Tue, July 12, 2016 Five Dallas police officers have been killed and seven wounded by sniper fire during protests against the shooting of black men by police. Play slideshow REUTERS 1 of 16 Former First Lady Laura Bush, former President George Bush, First Lady Michelle Obama and U.S. President Barack Obama hold their hands on their hearts as they sing the national anthem at a memorial service following the multiple police shootings in Dallas