Why Robert F. Kennedy's Jr.'s current presidential polling numbers might not hold up into November

WASHINGTON (AP) — Independent presidential candidate Robert F. Kennedy Jr. has reached 15% or more in three approved national polls. One more, and he will have met one of CNN's benchmarks to qualify for the debate June 27 with Democratic President Joe Biden and presumptive Republican nominee Donald Trump.

But Kennedy cannot count on maintaining his current level of support as the November election nears.

It is pretty common for third-party candidates to look like they have polling momentum in the months before an election, only to come up far short at the ballot box, according to an Associated Press analysis of Gallup data going back to 1980.

That is not a sign that the polls about Kennedy are wrong right now. They just are not predictors of what will happen in the general election.