Filmmaker Richard Linklater and the liberal-backed Fire Ted Cruz Rafael (Ted) Edward CruzCruz blocks amended resolution honoring Ginsburg over language about her dying wish Trump argues full Supreme Court needed to settle potential election disputes Press: Notorious RBG vs Notorious GOP MORE PAC are mocking the Republican Texas senator over the amends he made with President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE after their nasty 2016 presidential primary fight.

In a new ad, which was released on Monday, actor Sonny Carl Davis mocks Cruz over his claimed toughness, quipping, "If somebody called my wife a dog and said my daddy was in on the Kennedy assassination, I wouldn't be kissing their ass."

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"You stick a finger in their chest and give 'em a few choice words," Davis said. "Or you drag their ass out by the woodshed and kick their ass, Ted. C’mon, Ted."

Among other vicious attacks from 2016, Trump threatened to "spill the beans" on Cruz's wife, Heidi, and retweeted an unflattering photo of her compared to one of Melania Trump Melania TrumpTrump privately blamed Black Americans for lacking initiative: report The Hill's 12:30 Report: Ginsburg lies in repose Melania Trump: Ginsburg's 'spirit will live on in all she has inspired' MORE. He also pushed the unsubstantiated theory that Cruz's father may have been involved in the assassination of former President John F. Kennedy.

Cruz forcefully criticized Trump throughout the campaign and called him a coward. But the senator chose to support Trump after he won the GOP nomination, and he has defended that decision.

He also asked the president earlier this year to campaign on his behalf.

The ad from Linklater was released about a month before a midterm election between Cruz and Rep. Beto O'Rourke Beto O'RourkeJimmy Carter says his son smoked pot with Willie Nelson on White House roof O'Rourke endorses Kennedy for Senate: 'A champion for the values we're most proud of' 2020 Democrats do convention Zoom call MORE (D-Texas). While Texas has not elected a Democratic senator in about three decades, O'Rourke has gained a national following in his bid to unseat Cruz.

A new poll of their Texas Senate race released by Emerson College on Monday showed that Cruz had a 5-point advantage. The nonpartisan Cook Political Report, an election forecaster, rates the Texas Senate race as as "toss-up."