NEW YORK, June 19 (Reuters) - Time is running out for

Robert F. Kennedy Jr. to qualify for 2024's first U.S.

presidential debate, with the independent candidate counting on

a longshot bid with a U.S. elections agency to put him on the

stage.

CNN, host of the June 27 debate, says only President Joe

Biden and Republican rival Donald Trump have met its conditions

for taking part: appear on enough state ballots to potentially

win the presidency and also receive at least 15% in four

separate national polls.

Kennedy has received at least 15% in only three accepted

polls to date and has qualified for the ballot in six states,

making it impossible for him to win the presidency, said CNN, a

division of Warner Bros Discovery ( WBD ).

Kennedy's campaign says he is on the ballot in nine states

and has collected enough signatures to be on the ballot in 14

others, making it possible for him to win the election.

Kennedy, an environmental lawyer who has spread

misinformation on vaccines, is drawing supporters from both

sides of the political divide. It is not yet clear whether he

would pull more votes away from Biden or from Trump.

The deadline for candidates to qualify for the debate is 12

a.m. ET (0400 GMT) on Thursday.

Kennedy has filed a complaint with the Federal Election

Commission alleging CNN's debate is unfair and amounts to a

prohibited campaign contribution to Biden and Trump.

Kennedy has said Biden and Trump "are trying to exclude me

from their debate because they are afraid I would win."

The Kennedy campaign asked that the FEC take action by

Thursday and keep CNN, Biden and Trump from holding the June 27

debate unless they make changes.

The FEC declined to comment. The agency recently struggled

to rule on artificial intelligence in the 2024 campaign, and has

not ruled on related issues in recent elections, experts say.

"The mere application for ballot access does not guarantee

that he (Kennedy) will appear on the ballot in any state," a CNN

spokesperson said. "In addition, RFK Jr. does not currently meet

our polling criteria, which, like the other objective criteria,

were set before issuing invitations to the debate."

This election year presents a nearly unprecedented

situation. Not since 1960 ushered in the era of televised

presidential debates have news organizations been fully in

control of the terms and parameters of two debates between the

candidates. ABC, a unit of Walt Disney ( DIS ), is set to host a

September debate.

Most recently, the bipartisan Commission on Presidential

Debates has sponsored debates.

Biden and Trump, as the expected nominees of the Democratic

and Republican political parties, respectively, qualify because

most states automatically allow them ballot access without

petitioning, a CNN spokesperson said.

Derek Muller, a law professor at the University of Notre

Dame Law School, said having an independent candidate like

Kennedy on stage may make for a more substantive debate.

"If you're saying that we're looking for those candidates

that have serious support to weigh major issues, and dealing

with two of the least popular major presidential candidates of

all time, then the debate could definitely benefit from having a

third party on the stage. It's all dependent on your point of

view," Muller said.

Some 41% of registered voters in a recent Reuters/Ipsos poll

said they would vote for Trump if the election were held today,

while 39% picked Biden.

Ten percent of respondents would pick Kennedy were he on the

ballot with Trump and Biden, the poll showed.