HUNDREDS of thousands of people have joined marches in towns and cities across the US to demand Donald Trump’s administration reunites families separated at the US-Mexico border.

More than 700 protests are taking place, with marchers moved by accounts of children separated from their parents dressed in white and carrying signs reading “No more children in cages”.

Protesters flooded streets in immigrant-friendly cities like New York and Los Angeles to conservative Appalachia and Wyoming.

They gathered on the front lawn of a Border Patrol station in McAllen, Texas, near a detention centre where migrant children were being held in cages, and on a street corner near Mr Trump’s golf resort at Bedminster, New Jersey, where the president is spending the weekend.

Mr Trump has backed away from the family separation policy amid bipartisan and international uproar, and those marching on Saturday demanded the government quickly reunites the families that were already divided.

In the president’s hometown of New York City, an estimated 30,000 marchers poured across the Brooklyn Bridge in sweltering heat, some carrying their children on their shoulders, chanting “Shame!”

Trump took to Twitter on Saturday to show his support for Immigration and Customs Enforcement (ICE). He urged ICE agents to “not worry or lose your spirit”.