The USS John S. McCain (DDG 56) destroyer (C) is moored in a dock at the Yokosuka Naval Base on June 01, 2019 in Yokosuka, Japan. On Thursday, U.S. President Donald Trump has denied any involvement the move to hide the Navy Ship USS John S. McCain during his recent visit to its home port in Yokosuka, after reports emerged of emails being exchanged about keeping the ship out of view. (Photo by Tomohiro Ohsumi/Getty Images)
John McCain (R-AZ) prepares to greet supporters during a Veterans rally for U.S. Sen candidate and U.S. Rep. Bill Cassidy (R-LA) at the American Legion Post on October 13, 2014 in Covington, Louisiana. (Sean Gardner/Getty Images)
WASHINGTON, DC - APRIL 26: After answering questions from reporters, Sen. John McCain departs the U.S. Capitol for a briefing on North Korea at the White House April 26, 2017 in Washington, DC. Members of U.S. President Donald Trump's national security team held a briefing on North Korea at the White House for the entire U.S. Senate. (Photo by Win McNamee/Getty Images)
WASHINGTON, DC - JANUARY 21: U.S. Senator John McCain (R-AZ) gestures to U.S. Rep. Peter King before the presidential inauguration on the West Front of the U.S. Capitol January 21, 2013 in Washington, DC. Barack Obama was re-elected for a second term as President of the United States. (Photo by Win McNamee/Getty Images)
WASHINGTON, DC - JULY 11: Senate Armed Services Committee members (L-R) Sen. James Inhofe (R-OK), Chairman John McCain (R-AZ) and ranking member Sen. Jack Reed (R-RI) listen to testimony during the confirmation hearing for Richard Spencer in the Dirksen Senate Office Building on Capitol Hill July 11, 2017 in Washington, DC. Spencer was nominated by President Donald Trump to be the 76th secretary of the U.S. Navy. (Photo by Chip Somodevilla/Getty Images)
Robert Lighthizer, nominee for US Trade Representative, speaks at the Senate Finance Committee full hearing on the nomination of the U.S Trade Representative in Washington, DC March 14, 2017. / AFP PHOTO / Tasos KATOPODIS (Photo credit should read TASOS KATOPODIS/AFP/Getty Images)
Robert Lighthizer, nominee for US Trade Representative, speaks at the Senate Finance Committee full hearing on the nomination of the U.S Trade Representative in Washington, DC March 14, 2017. / AFP PHOTO / Tasos KATOPODIS (Photo credit should read TASOS KATOPODIS/AFP/Getty Images)
WASHINGTON, DC - SEPTEMBER 12: A sign stand outside the U.S. State Department September 12, 2012 in Washington, DC. U.S. Ambassador to Libya J. Christopher Stevens and three other Americans were killed in an attack on the U.S. Consulate in Benghazi, Libya. (Photo by Alex Wong/Getty Images)
OSKALOOSA, IA - JULY 25: Republican presidential hopeful businessman Donald Trump speaks to guests gathered for a rally on July 25, 2015 in Oskaloosa, Iowa. During his last visit to the state Trump sparked controversy when he said Senator John McCain (R-AZ), a former POW, was not a war hero. (Photo by Scott Olson/Getty Images)
The President of the United States has many responsibilities, but none is more important than Article Two of the Constitution’s charge that 'The President shall be Commander in Chief...' of our armed forces.
WASHINGTON, DC - SEPTEMBER 10: U.S. Sen. Ted Cruz (R-TX) (L) and Sen. Rand Paul (R-KY) wait to speak at the "Exempt America from Obamacare" rally, on Capitol Hill, September 10, 2013 in Washington, DC. Some conservative lawmakers are making a push to try to defund the health care law as part of the debates over the budget and funding the federal government. (Photo by Drew Angerer/Getty Images)