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Members of the media take photographs inside the George W. Bush Presidential Library and Museum for a preview of the art painted by former president George W. Bush. (Photo by Stewart F. House/Getty Images) ( 482704841 )

A portrait of King Abdullah of Saudi Arabia, left, which is part of the exhibit "The Art of Leadership: A President's Diplomacy," is on display at the George W. Bush Presidential Library and Museum in Dallas, Friday, April 4, 2014. The exhibit of world leader portraits painted by former President George W. Bush opens Saturday and runs through June 3. At far right is a portrait of former and late Czech President Vaclav Havel. (AP Photo/Benny Snyder) ( Bush Portrait Exhibit )

Paintings by former president George W. Bush are on display with photographs as part of the exhibit, "The Art of Leadership: A President's Personal Diplomacy" at the George W. Bush Presidential Library and Museum on April 4, 2014 in Dallas, Texas. (Photo by Stewart F. House/Getty Images) ( 482705551 )

A portrait of former British Prime Minister Tony Blair which are part of the exhibit "The Art of Leadership: A President's Diplomacy," is on display at the George W. Bush Presidential Library and Museum in Dallas, Friday, April 4, 2014. (AP Photo/Benny Snyder) ( Bush Portrait Exhibit )

A self portrait of former President George W. Bush which is part of the exhibit "The Art of Leadership: A President's Diplomacy," is on display at the George W. Bush Presidential Library and Museum in Dallas, Friday, April 4, 2014. (AP Photo/Benny Snyder) ( Bush Portrait Exhibit )

A portrait of Afghan President Hamid Karzai, which is part of the exhibit "The Art of Leadership: A President's Diplomacy," is on display at the George W. Bush Presidential Library and Museum in Dallas, Friday, April 4, 2014. (AP Photo/Benny Snyder) ( Bush Portrait Exhibit )

A portrait of Ehud Olmert, Prime Minister of Israel, painted by former president George W. Bush is displayed between two photographs as part of the exhibit, "The Art of Leadership: A President's Personal Diplomacy" at the George W. Bush Presidential Library and Museum on April 4, 2014 in Dallas, Texas. (Photo by Stewart F. House/Getty Images) ( 482705047 )

A detail of a portrait of former Pakistani President Pervez Musharraf, which is part of the exhibit "The Art of Leadership: A President's Diplomacy," is on display at the George W. Bush Presidential Library and Museum in Dallas, Friday, April 4, 2014. (AP Photo/Benny Snyder) ( Bush Portrait Exhibit )

A portrait of Iraqi Prime Minister Nouri al-Maliki which is part of the exhibit "The Art of Leadership: A President's Diplomacy," is on display at the George W. Bush Presidential Library and Museum in Dallas, Friday, April 4, 2014. (AP Photo/Benny Snyder) ( Bush Portrail Exhibit )

Portraits of world leaders, which are part of the exhibit "The Art of Leadership: A President's Diplomacy," are on display at the George W. Bush Presidential Library and Museum in Dallas, Friday, April 4, 2014. (AP Photo/Benny Snyder) ( Bush Portrait Exhibit )

Members of the press preview the exhibit "The Art of Leadership: A President's Personal Diplomacy" at the George W. Bush Presidential Library and Museum on April 4, 2014 in Dallas, Texas. (Photo by Stewart F. House/Getty Images) ( 482719187 )