Undocumented crossings at the US’s southern border have fallen to a three-year low, marking the lowest in Joe Biden’s presidency just a short time after he signed a controversial executive order limiting immigration there in June.

The latest data from the federal Customs and Border Patrol obtained by CBS News is the most recent since Biden signed his executive order – and comes as the president is accused of failing to address concerns about the amount of people crossing into the US without permission.

About 84,000 people crossed into the US without documentation in June, the lowest monthly total since Biden assumed office in January 2021, CBS reported.

That reduction forms part of a broader trend that has seen the number of people who have entered the US without authorization steadily decrease since February, when 141,000 were apprehended at the border.

Biden’s executive order restricts asylum seekers from crossing the southern border when a daily limit of crossings has been exceeded. Biden signed the order after Republicans blocked a bipartisan immigration bill that was set to limit asylum.

“We must face a simple truth,” Biden said when the order was signed. “To protect America as a land that welcomes immigrants, we must first secure the border and secure it now.”

The mandate received condemnation from Democrats, particularly progressives and immigration advocates, who viewed it as punitive and reminiscent of the Donald Trump White House’s previous asylum ban.

“It violates fundamental American values of who we say we are – and puts people in danger,” said Vanessa Cárdenas, the executive director of America’s Voice, an immigration advocacy organization, to the Guardian. “It’s part of a trap that the Democrats are falling into – they’re buying the narrative the right is pushing on immigration.”

Biden’s action came amid polling which showed that a majority of registered voters don’t approve of his handling of immigration, a top-ranking issue in the 2024 presidential election. The Democrat’s executive order has done little to persuade disgruntled voters, according to a recent poll from Monmouth University.

Biden has also faced consistent criticism from Republicans for failing to address record amounts of migrants arriving into the US through its border with Mexico.

During Thursday’s presidential debate, Trump – the presumptive Republican nominee – repeatedly brought up the murder and assault of 12-year-old Jocelyn Nungaray, who was killed in Texas by two Venezuelan men who reportedly entered the country illegally.

“There have been many young women murdered by the same people he allows to come across our border,” Trump said, as Reuters reported. “These killers are coming into our country and they are raping and killing women. And it’s a terrible thing.”