An expert's point of view on a current event.Despite their policy differences, the successive administrations of U.S. Presidents George W. Bush, Barack Obama, and Donald Trump have all struggled to balance the United States’ expansive security objectives in the Middle East with the limited resources available to pursue them. Their maximalist policy goals aimed not just to mitigate the risk of a terrorist attack on U.S. soil, but to eradicate al Qaeda and the Islamic State wherever local branches took root; not just to push back against Iran’s influence in key strategic locations, but to...…An expert's point of view on a current event.Despite their policy differences, the successive administrations of U.S. Presidents George W. Bush, Barack Obama, and Donald Trump have all struggled to balance the United States’ expansive security objectives in the Middle East with the limited resources available to pursue them. Their maximalist policy goals aimed not just to mitigate the risk of a terrorist attack on U.S. soil, but to eradicate al Qaeda and the Islamic State wherever local branches took root; not just to push back against Iran’s influence in key strategic locations, but to...WW…