Detailed Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Q: Kirstjen Nielsen moved with John Kelly to the West Wing as his principal deputy chief of staff when he was appointed as White House chief of staff in July, leaving the cabinet post vacant. | Andrew Harnik/AP Trump to nominate Kelly's White House deputy as DHS secretary Kirstjen Nielsen, who served as Kelly's chief of staff at DHS, was his pick to fill his old job, which has been vacant since July. 
  
 The White House announced on Wednesday that President Donald Trump will nominate Kirstjen Nielsen to run the Department of Homeland Security. 
  
 Nielsen served as White House chief of staff John Kelly’s top aide during his time as DHS secretary and moved with him to the West Wing as his principal deputy chief of staff when he was appointed in July, leaving the Cabinet post vacant. 
  
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 Nielsen, 45, is a cybersecurity expert and an attorney with an extensive background in homeland security, including stints at the Transportation Security Administration and on the White House Homeland Security Council under President George W. Bush. 
  
 “She would be the first person to run the department who has actually worked there,” a person close to the administration said earlier on Wednesday. “She has a deep familiarity.” 
  
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 Nielsen developed a close working relationship with Kelly during the transition, in which she served as his “sherpa,” guiding him through the Senate confirmation process. 
  
 Her selection was reported first by POLITICO. Previously considered a dark horse candidate for the post, she rose to the top of the list at Kelly’s recommendation — and after other candidates fell through. 
  
 Other people considered by the White House included House Homeland Security Chairman Michael McCaul of Texas, who was passed over because Trump aides didn’t think he had the breadth of knowledge or management capability to do the job. 
  
 Nielsen’s no-nonsense style has rankled some in the White House, who had grown accustomed to a freewheeling West Wing under Kelly’s predecessor, Reince Priebus. But Nielsen has been instrumental in Kelly’s efforts to push Trump and his senior aides to use the disciplined policymaking processes of previous administrations, which has limited the flow of paper to the president as well as the stream of advisers who had breezed in and out of the Oval Office. 
  
  ||||| WASHINGTON — President Trump said on Wednesday that he intended to name Kirstjen Nielsen, a top White House aide, to lead the Department of Homeland Security, elevating a former homeland security official in the George W. Bush administration who has lately worked to impose order in Mr. Trump’s chaotic West Wing. 
  
 Mr. Trump announced his choice in a statement that noted Ms. Nielsen’s “extensive professional experience in the areas of homeland security policy and strategy, cybersecurity, critical infrastructure and emergency management.” She is the first nominee for the homeland security post who had served in the department, according to the statement. 
  
 If confirmed, Ms. Nielsen would replace John F. Kelly, who was homeland security secretary until he left in July to serve as the White House chief of staff and bring discipline and direction to a West Wing plagued by disorganization and infighting. Mr. Kelly had drafted Ms. Nielsen to be his chief of staff at the Homeland Security department, and when the president plucked him for the White House, he brought her as his No. 2. 
  
 Known as a no-nonsense player and policy wonk, Ms. Nielsen appears unlikely to land at the center of the type of controversies that have engulfed Mr. Trump’s presidency. But her regimented style in a freewheeling and often dysfunctional West Wing frustrated some senior officials and people close to the president, who chafed under her dictates. On Wednesday, some of them described Ms. Nielsen’s promotion as a solution to a toxic personnel situation, while others fretted privately that her departure would create a void at the White House that would be difficult to fill. |||||
A:
President Trump announced Wednesday he will nominate Kirstjen Nielsen to replace John Kelly as the head of the Department of Homeland Security after the latter left the post to become Trump's chief of staff, Politico reports. Nielsen is an attorney and cybersecurity expert who served in the Transportation Security Administration and on the White House Homeland Security Council under the second President Bush. She was Kelly's second in command at both the White House and DHS, and Kelly was said to be pushing Trump to nominate her. The New York Times states Nielsen is "known as a no-nonsense player and policy wonk" whose style has "frustrated" some people close to Trump during her time at the White House. A number of senior White House officials say her move to DHS would solve some workplace issues for them.