“Part of the reason is that he thumbed his nose in the DNC (Democratic National Committee).

“The DNC thumbed their noise at New Hampshire for being the first in the nation primary, so the delegates don’t count, even though Biden won a majority there.

“Biden does have problems with independents as well, for different reasons, that potentially opens the door for an independent campaign come November.”

Robert F Kennedy Jr has drawn concern from Democrats over how he could transform the presidential race with the independent candidate gaining momentum.

He announced on Tuesday he had amassed enough signatures to qualify for New Hampshire’s ballot for the general election, after already getting on Utah’s.

Kennedy freed himself from the Democratic Party to run as an independent and is giving the party a headache with his commitment to being on the ballot for battleground states.

Biden’s write-in win in New Hampshire saw the President and his inner circle swiftly moving on to focus on Trump, who is the overwhelming favourite for the Republican nomination.

In a statement released by his campaign this week, the incumbent said: “It is now clear that Donald Trump will be the Republican nominee.

“And my message to the country is the stakes could not be higher.”

In a newly launched website for Kennedy’s campaign to get on the ballot of other states, his team say his effort is “in progress” in more than a dozen states, including Nevada, Arizona and Georgia.