WASHINGTON - Anti-vaccine activist and conspiracy theorist Robert F Kennedy Jr’s long-shot presidential bid appears to be drawing more support from former president Donald Trump than President Joe Biden, according to a new poll.

The survey of 1,000 registered voters, conducted between 12-15 April by NBC News, revealed that Mr Biden is trailing Mr Trump by two percentage points in a hypothetical two-way race, 46 per cent to 44 per cent.

However, when third-party and independent candidates are added to the mix, Mr Biden emerges with a two-point advantage over Mr Trump - 39 per cent to 37 per cent.

The poll found that Mr Kennedy, who is running as an independent, draws 13 per cent; former Harvard professor Cornel West draws 2 per cent; and Green Party perennial candidate Jill Stein gets 3 per cent.

While the results are well within the survey’s 3.1 per cent margin of error, it shows the potential impact of third-party nominees and independents on the two main party candidates.

Although a scion of one of America’s most prominent political families — the son of late senator Robert F Kennedy and nephew of late president John F Kennedy — RFK Jr’s entrance into the 2024 race, first as a Democratic primary contender and later as an independent, was mainly hailed by Republicans who see his candidacy as key to pulling support from Mr Biden in swing states.

The Biden campaign has taken the threat of Mr Kennedy seriously, bringing on a veteran operative, Lis Smith, to combat political dangers from him, and other third-party candidates.

The new NBC polling comes days after a group of Kennedy family members officially endorsed Mr Biden at an event, a move viewed as a major snub to their errant relative.