United States President Donald Trump has removed Kristi Noem as head of the powerful United States Department of Homeland Security, in a move that has sparked fresh debate over the administration’s immigration policies.
Trump announced on Thursday that Noem would be replaced by Markwayne Mullin, a Republican senator from Oklahoma. Mullin is expected to officially take over the position on March 31, pending confirmation by the United States Senate.
The Department of Homeland Security, commonly known as DHS, plays a major role in enforcing immigration laws and protecting the country’s borders. It oversees several key agencies, including U.S. Immigration and Customs Enforcement (ICE) and U.S. Customs and Border Protection.
These agencies are responsible for immigration enforcement, border control, and counter-terrorism operations within the United States.
In a message posted on his social media platform, Truth Social, Trump praised Noem for her work but said Mullin would take over leadership of the department.
According to the president, Noem would move to another role within his administration as a special envoy for a new regional security plan called “The Shield of the Americas.”
Trump said the initiative would focus on improving security cooperation across countries in the Western Hemisphere.
“Noem has served us well and has had numerous and spectacular results, especially on the border,” Trump said.
He also described Mullin as a loyal supporter of his political agenda.
“Markwayne is a MAGA warrior and will be a spectacular Secretary of Homeland Security,” the president said.
The phrase “MAGA,” which stands for “Make America Great Again,” has been the central slogan of Trump’s political movement and policy agenda.
Trump returned to the White House after campaigning strongly on promises to tighten immigration rules and remove millions of undocumented migrants from the United States.
Since taking office again, his administration has launched an aggressive immigration crackdown aimed at increasing deportations and strengthening border enforcement.
The Department of Homeland Security plays a key role in implementing these policies.
Through agencies such as ICE and Customs and Border Protection, DHS oversees detention operations, border patrols, and the removal of migrants who are found to be living in the country without legal status.
Trump said Mullin would work to strengthen these efforts.
“Markwayne will work tirelessly to keep our border secure, stop migrant crime and other criminals from illegally entering our country, and end the scourge of illegal drugs,” the president said.
Although Trump praised Noem’s work, reports from several US media outlets suggested that tensions between the president and the former DHS chief had increased following a Senate hearing earlier this week.
During the hearing, Noem faced strong criticism from lawmakers from both major political parties.
At the hearing, Dick Durbin, a senior Democratic senator, accused the department of ignoring the rule of law in its enforcement of immigration policies.
“Under your leadership, the Homeland Security Department has been devoid of any moral compass or respect for the rule of law,” Durbin told Noem.
Durbin and other Democrats also questioned her about the deaths of two Americans who were shot by federal agents in Minnesota during protests linked to the immigration crackdown.
Lawmakers said the victims had been labelled “domestic terrorists” by authorities, a claim that critics argue was unfair.
Several senators demanded that Noem apologise for the incident, but the issue remained unresolved during the hearing.
The criticism during the Senate session did not come only from Democrats.
Some Republican lawmakers also expressed concern about the way the department had handled certain immigration enforcement operations.
Thom Tillis, a Republican senator, criticized the department’s leadership and said mistakes had been made.
“What we’ve seen is a disaster under your leadership,” Tillis said during the hearing.
He also raised concerns about cases where individuals who were later confirmed to be US citizens were mistakenly detained during immigration enforcement operations.
The senator said such errors could damage public trust in the system.
Another Republican senator, John Kennedy, questioned Noem about a $220 million advertising campaign launched by the Department of Homeland Security.
The television advertisements urged undocumented migrants living in the United States to leave the country voluntarily rather than face arrest and deportation.
Noem defended the campaign during the hearing, saying it had been effective in encouraging migrants to self-deport.
However, Kennedy responded with a sharp remark.
“They were effective in your name recognition,” the senator said, suggesting that the advertisements helped raise Noem’s public profile.
The change in leadership at DHS comes at a time when the department is facing a partial shutdown due to a funding dispute in Congress.
Lawmakers from the Democratic Party have opposed approving new funds for DHS until changes are made to the way immigration enforcement operations are conducted.
The dispute reflects the deep political divisions in the United States over immigration policy.
Democratic lawmakers have demanded reforms aimed at increasing transparency and protecting civil rights during immigration operations.
Among their proposals are restrictions on patrol practices by ICE agents and new rules requiring officers to obtain judicial warrants before entering private property.
They have also called for a ban on immigration officers wearing face masks during enforcement operations, arguing that such practices reduce accountability.
Supporters of the administration’s policy say strong enforcement measures are necessary to secure the country’s borders and reduce illegal immigration.
Although Trump has nominated Mullin to take over as Secretary of Homeland Security, the appointment must still be approved by the US Senate.
The Senate currently has a Republican majority, which could make the confirmation process easier for the president’s nominee.
If confirmed, Mullin will assume responsibility for one of the largest and most powerful departments in the US government.
The Department of Homeland Security was created in 2002 after the September 11 attacks to coordinate national security efforts and protect the country from threats such as terrorism and cybercrime.
Today, the department employs hundreds of thousands of workers and oversees several agencies involved in border security, emergency response, and infrastructure protection.
The leadership change highlights the importance of DHS in shaping the United States’ immigration and security policies.
For Trump, immigration enforcement has remained a central part of his political agenda since his first presidential campaign in 2016.
Supporters argue that strict border control is necessary to protect jobs and maintain security.
Critics, however, say aggressive enforcement measures can lead to human rights concerns and harm immigrant communities.
As the Senate prepares to consider Mullin’s nomination, political observers say the debate over immigration policy is likely to remain one of the most divisive issues in American politics.
For now, Noem’s removal marks another major shift in leadership at a department that sits at the centre of the country’s ongoing debate over immigration, border control, and national security.
