Former Alaska governor Sarah Palin.  (Kris Connor/Getty Images)

Sarah Palin said in a television interview broadcast Sunday that she will support Speaker Paul Ryan's primary challenger, and she compared Ryan to former House majority leader Eric Cantor (Va.), who was stunningly defeated in a 2014 primary.

"I think Paul Ryan is soon to be 'Cantored,'" Palin said on CNN's "State of the Union." Cantor lost his primary to now-Rep. Dave Brat.

Palin, a former Alaska governor and 2008 GOP vice presidential nominee, backs Donald Trump for president. Ryan said this week that he is not ready to support Trump — even though he is the presumptive GOP nominee. Trump and Ryan are slated to meet this week.

Speaker Paul Ryan has backed away from his pledge to support whoever becomes the nominee, saying he's "not ready" to endorse Republican presidential candidate Donald Trump. Other GOP heavyweights, including the Bushes, are also not giving endorsements. (Jenny Starrs/The Washington Post)

"His political career is over but for a miracle, because he has so disrespected the will of the people ... and for him to already come out and say who he will not support was not a wise decision of his," Palin added of Ryan.

Businessman Paul Nehlen is challenging Ryan in the Aug. 9 Republican primary. Nehlen has criticized Ryan's refusal to back Trump and has issued a statement saying, “If Mr. Trump is the nominee, I will support that decision."

In her interview, Palin said, "I will do whatever I can for Paul Nehlen."