Introduction: in the shadow of the Cold War; 1. George H. W. Bush: new world order, old world president, 1989–1992; 2. Bill Clinton: new think, 1993–1996; 3. Bill Clinton: the return of old think, 1997–2000; 4. George W. Bush: a new Cold War, 2001–2004; 5. George W. Bush: Truman redux, 2005–2008; 6. Barack Obama's flexible response, 2009–2012; 7. Barack Obama's soft containment, 2013–2017; Conclusion: Donald Trump and the end of the Cold War shadow?