With America's future at stake in November, I decided to support Mitt Romney for three reasons: his Reaganaut philosophy, executive experience and general-election campaign strengths. Our country's political focus on economic recovery has allowed President Obama to escape responsibility for his failures in the area of national security. Mr. Obama clearly doesn't recognize that lasting prosperity is impossible without robust foreign and defense policies and capabilities—and, conversely, that the requisite political, military and intelligence resources are not sustainable without a strong economy. Today's textbook example: the president's rejection of the Keystone XL oil pipeline from Canada. Mr. Romney fully understands...