Google is under investigation by European Union antitrust watchdogs over concerns it unfairly demotes some news results in a probe that risks adding to its €9.5 billion ($11 billion) EU fines tally and worsening fraught relations with the Trump administration.The European Commission said on Thursday it suspects the Alphabet Inc. unit may be violating the bloc’s Digital Markets Act by pushing down results for publishers’ websites when they include content from commercial partners....