Joe Biden maintained his lead for the Democratic presidential nomination as minorities gravitated toward the former vice president and his top rival, United States Senator Bernie Sanders of Vermont, in search of the safest bets for beating President Donald Trump in 2020, according to a Reuters/Ipsos poll.

Biden and Sanders emerge as top two candidates for the 2020 US presidential elections:Polls

The poll suggests that the Leave and Remain campaigns are running neck and neck

Brexit vote: Remain 52 per cent, Leave 48 per cent, says Ipsos MORI poll

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Biden and Sanders emerge as top two candidates for the 2020 US presidential elections:Polls

Brexit vote: Remain 52 per cent, Leave 48 per cent, says Ipsos MORI poll