With Donald Trump back in office, Europe faces a new era of uncertainty. The once-reliable comfort of American support — a cornerstone of European security — is now more in question than ever. For decades, Europe has assumed the U.S. would always be there to pick up the slack. But those days are over. Trump's administration openly questions NATO’s role and views American involvement in European security with skepticism. Europe must now confront a new reality: it can no longer sit back, assuming