"The poll will test the results of a head-to-head race between Biden and Trump and me and Trump," RFK Jr. said at a press event in New York City. "Whoever comes in third will drop out of the presidential race," he added. 

The poll would need to survey at least 30,000 voters in all 50 states, which would give it "a margin of error of virtually zero," RFK Jr. said. 

The argument from the candidate, a nephew of former President John F. Kennedy and son of Sen. Robert F. Kennedy, is that the current state of the race shows Biden is the spoiler to his candidacy, not the other way around as has been reported in polls and the press. 

"If I stayed in the race and the election were held today, Trump would win. If I dropped out and the election were held today, Trump would win by an even bigger margin," RFK Jr. said. "The people who believe that I am a spoiler for Vice President Biden need to look at the data." 

RFK Jr. pointed to the results of a poll from John Zogby Strategies, which surveyed 26,408 likely voters in all 50 states and claims to have a razor-thin margin of error of 0.6%. The campaign argued that this poll is more substantial than those that have been reported in the media because it has a larger sample size, though the quality of a poll is judged by the representativeness of its sample, not its raw numbers. 

"Head-to-head with Trump, I would beat him by 24 points," RFK Jr. said, pointing to numbers projected on a screen. 

The graphics displayed by the campaign showed Kennedy Jr. winning either two-way matchup: Against Trump, the independent candidate would win by two Electoral College votes (270 to 268). And against Biden, Kennedy Jr. would win by a landslide of 367 to 171. 

The campaign's argument is that the only scenario in which Donald Trump does not win is if the race is between him and Kennedy Jr., making Biden the true spoiler. 

"What we want in this election is for the American people to feel that they don't have to vote out of fear, but they can vote out of hope," Robert F. Kennedy Jr. said. "That can only happen if it's a two-person race, either me and Biden or me and Trump." 

Polls have shown that RFK Jr.'s candidacy is pulling votes from both Joe Biden and Donald Trump, but a recent NBC News poll found that he may be more damaging to Trump. 

The independent argued at the event that the only way to end the polarization and division in the country is for him to succeed. 

But the challenge to the pledge he announced Tuesday, which RFK Jr. is calling the "No Spoiler Pledge," comes as his campaign is still struggling to gather enough signatures to qualify for the ballot in most states. He has only secured a spot on the ballot in California, Utah, and Michigan. 

Robert F. Kennedy Jr. has chosen a wealthy Silicon Valley attorney, Nicole Shanahan, as his running mate and has been holding rallies across the country. 

At the press event in New York City, the candidate repeated one of his central arguments: that Joe Biden and Donald Trump are very different people with distinct ideologies but have both proven incapable of solving the existential problems facing the United States. 

For him, those problems are the exploding national debt, the destruction of the country's soil, and the epidemic of chronic disease. RFK Jr. has criticized both men for failing to end the country's toxic divisions and for perpetuating the war machine. 

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