The crisis on the US-Mexico border has turned into one of the biggest challenges facing the Biden administration. Last month, a Quinnipiac poll found that just 23 percent of Americans approved of the president’s handling of the issue. Many others, including former president Donald Trump, have accused Joe Biden of causing the debacle.

Footage reportedly coming out of Tapachula, Mexico shows what looks like thousands of migrants marching through the southern Mexican border city on their way north to the country’s capital and possibly on to the US.