Former Gov. Sarah Palin (R-Alaska) says Sen. Ted Cruz Rafael (Ted) Edward CruzMurkowski: Supreme Court nominee should not be taken up before election Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE (R-Texas) has no political future after refusing to endorse Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE.

“Cruz’s broken pledge to support the will of the people tonight was one of those career-ending ‘read my lips’ moments,” she said late Wednesday in a statement to Breitbart News.

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“I guarantee American voters took notice and felt more unsettling confirmation as to why we don’t much like typical politicians, because they campaign one way but act another way,” the GOP’s 2008 vice presidential nominee added.

“That kind of political status quo has got to go because it has got us into the mess we’re in with America’s bankrupt budgets and ramped up security threats.”

Palin said Cruz’s decision not to back Trump reconfirms voters’ fears that politicians' promises do not matter.

“It’s commonplace for politicians to disbelieve their word is their bond, as evidenced by Cruz breaking his promise to endorse his party’s nominee, evidently thinking whilst on the convention stage, ‘at this point, what difference does it make?’” said Palin, who has endorsed Trump.

“We’ve been burned so horribly by that attitude that voters won’t reward politicians pulling that ‘what difference does it make?’ stunt again. Politicians will see — it makes all the difference in the world to us.”

Cruz, who ran against Trump in the primaries, late Wednesday declined to endorse Trump during a dramatic speech at the Republican National Convention.

“Stand and speak and vote your conscience, vote for candidates up and down the ticket who you trust to defend our freedom and to be faithful to the Constitution,” he said in Cleveland.

Cruz only mentioned Trump once during his speech, praising the GOP nominee’s victory.

“I congratulate Donald Trump on winning the nomination last night,” he said early in his remarks.