George Simion, a nationalist and vocal supporter of U.S. President Donald Trump, has won Romania’s first-round presidential election after capitalizing on widespread anti-establishment sentiment.

Far-right candidate George Simion was declared the winner Monday in the first round of Romania's presidential election.

A George Simion victory could isolate Romania, erode private investment and destabilise NATO's eastern flank, where Ukraine is fighting a three-year-old Russian invasion, political observers say.