McAllen, Texas (CNN) Texas Democratic Senate candidate Beto O'Rourke said at a CNN town hall Thursday night that he would still vote to impeach President Donald Trump.

The El Paso congressman challenging Sen. Ted Cruz said that his position on impeachment hadn't changed, even as Cruz has used the issue to galvanize conservative voters against O'Rourke's campaign.

Asked by CNN's Dana Bash if he had changed his mind after saying he'd vote to impeach Trump this summer, O'Rourke said, "I haven't."

He pointed to the ongoing probe into whether Trump's 2016 campaign colluded with Russia.

"There may be an open question as to whether the President, then the candidate, sought to collude with the Russian government in 2016," O'Rourke said. "But to quote George Will -- very conservative columnist -- when we saw him on that stage in Helsinki defending Vladimir Putin, the head of the country that attacked our democracy in 2016 instead of this country, and its citizens and this amazing democracy, that was collusion in action."

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