Lance Armstrong is throwing his support behind Senate nominee Beto O’Rourke, a rising Democratic star who is hoping to unseat GOP Sen. Ted Cruz Rafael (Ted) Edward CruzThe Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' Cruz blocks amended resolution honoring Ginsburg over language about her dying wish Trump argues full Supreme Court needed to settle potential election disputes MORE in the Texas race.

The controversial cyclist, who himself once hinted at a run for office, tweeted his endorsement for O’Rourke, a Democratic congressman from El Paso, on Thursday.

“Dear my fellow Texans, we have a choice,” Armstrong wrote. “This guy or Ted Cruz. It’s time for reasonable and balanced talk on ALL issues … WE are for @BetoORourke!”

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Dear my fellow Texans, we have a choice. This guy or @tedcruz. It’s time for reasonable and balanced talk on ALL issues - here’s one snippet. WE are for @BetoORourke! https://t.co/3duIGWiB12 — Lance Armstrong (@lancearmstrong) August 24, 2018

Armstrong shared his comment along with a video of O’Rourke defending NFL players kneeling during the national anthem to protest police brutality and racial inequality.

In the viral clip, O’Rourke gives a passionate defense of the players’ protests, saying he “can think of nothing more American.”

A recent NBC News/Marist poll shows Cruz leading O’Rourke by 4 points in the race. Texas has not elected a Democrat to the Senate in decades.

A number of social media users responded to Armstrong’s tweet, mocking him, saying his endorsement shouldn’t be trusted because of his use of performance-enhancing drugs and efforts to cover it up during his cycling career. Armstrong was stripped of his seven Tour de France titles in 2012.

“Guessing the Cruz campaign will be sending you a thank you note for this one,” one person wrote.