Calin Georgescu, the far-right frontrunner in Romania’s presidential vote, has been barred from running in May’s election, in an explosive decision that sparked violence on the streets of Bucharest and came despite pressure from Washington to “listen” to voters’ demands.

Former Romanian Prime Minister Victor Ponta joined the race for May's presidential election re-run on Wednesday as the hard right worked to ensure they had a candidate in the contest after the ban on pro-Russian Calin Georgescu threw the vote wide open.