Deputy Secretary of Defense On March 16, 2017, President Trump announced his intent to nominate Shanahan as the 33rd
Deputy Secretary of Defense, the Pentagon's second-highest civilian position. Trump nominated Shanahan to lead plans to increase the size of the military. Shanahan's Senate confirmation hearing took place on June 20, 2017. During the hearing, Senator
John McCain, a proponent of providing arms to
Ukraine, threatened to block Shanahan's nomination over his response in a written statement about whether or not the U.S. should provide such weapons to Ukraine. Shanahan said he did not have access to classified military information in order to make a decision on the matter.
Robert O. Work, the Deputy Secretary of Defense at the end of the Obama administration, remained in the position until Shanahan's confirmation. Shanahan was confirmed by the
United States Senate with a vote of 92–7 on July 18, 2017, and became the 33rd Deputy Secretary of Defense on July 19, 2017. due to language in Mattis's resignation letter which criticized Trump's worldview. Shanahan assumed the office on January 1, 2019. Shanahan made an unannounced trip to
Afghanistan on February 11, 2019, meeting with President
Ashraf Ghani, the country's chief executive
Abdullah Abdullah, and defense minister
Asadullah Khalid during the first few hours of his trip. Shanahan visited the
US–Mexico border on February 23, 2019, with
Chairman of the Joint Chiefs of Staff USMC General
Joseph Dunford and Commander of the
United States Army Corps of Engineers Lt. Gen.
Todd T. Semonite for joint assessments with
Border Patrol,
DHS, and others. In late March 2019, news sources reported that Shanahan was under investigation by
Office of Inspector General because of allegations he improperly advocated on behalf of his former employer, Boeing Co. In a May 2019 internal memo, Shanahan ordered new restrictions on how information about global operational plans and orders are shared with Congress, such that summaries are provided rather than an actual plan or order that was requested. On May 9, 2019, the White House announced that President Trump would nominate Shanahan as his second defense secretary, despite skepticism and even hostility from lawmakers and officials within the Department of Defense. However, Shanahan withdrew from the confirmation process in June, following increased public scrutiny of several incidents and allegations of domestic violence involving Shanahan's ex-wife and son. In a tweet addressing the withdrawal of the nomination, President Trump said that Shanahan intended to "devote more time to his family." == Post-Department of Defense career ==