The Trump shock is inflicting tremendous malimpacts on global security as Donald Trump launched “America First”, that he would repeal American alliance network, in order to save the cost of overseas defense. Furthermore, Trump even praises Russian President Vladimir Putin, and suggested concessions to Russia over Crimea and Syria. Therefore, European nations are seriously considering joint regional defense, in case the United States falls into terrible isolationism under the Trump regime, while Russian threats are growing.

The most critical problem of Trump’s foreign policy is an extreme obsession with costs and benefits. There is no denying that America spends disproportionately on defense, as it accounts for 70% of NATO total. Since the Cold War, any US president or presidential candidate has been demanding burden sharing to European allies. However, hardly any of them have doubted that it is America’s vital interest to maintain European security by NATO. However, Trump is overturning this, as he does not believe in American power as the global public goods. In view of his extreme zero-sum views on international politics, Europe needs to boost defense spending, and remind him how much contribution they make to American wars in Afghanistan, Iraq, and the Balkans. Otherwise, Trump would not cooperate with European allies, as to the issues like  Russia and the Iran nuclear deal, and just pursue his own perceived interests of the United States. Also, European nations must show strong unity to save the Trans Atlantic alliance from Trump’s dire pressure (“Does 'America First' mean EU defence atlast?”;Centre for European Reform Bulletin; 22 November, 2016).