The US secretary of homeland security MS Kirstjen Nielsen, who enforced some of President Donald Trump’s controversial border policies, has resigned.
President Donald Trump said customs and border protection Commissioner Kevin Mcaleenan will replace her temporarily.
MS Nielsen was responsible for the proposed border wall with Mexico and the separation of migrant families.
Her resignation came after the president indicated he wanted to follow a “tougher” immigration policy. He has often accused MS Nielsen of not being tough enough.
Reports say in recent months, illegal crossings from Central America have surged and Mr Trump has threatened to close the Mexico border.
He has since backtracked and promised to give Mexico a year to stop drugs and migrants crossing into the US.