The race for the Senate in Texas is a dead heat, with Sen. 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 (R) leading 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 by only three points, according to a Public Policy Polling (PPP) survey released Thursday.

The survey by the left-leaning pollster shows Cruz slightly ahead with 48 percent of the vote compared to O'Rourke's 45 percent. That's well within the poll's 4-point margin of error.

The PPP poll comes a day after a Reuters/Ipsos/University of Virginia Center for Politics survey showed O'Rourke with a slight 2-point advantage over Cruz. Taken together, the polls underscore the increasingly competitive nature of the race.

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O'Rourke, a three-term representative, mounted what appeared to be a long-shot bid for Cruz's Senate seat last year. Texas hasn't elected a Democrat to the Senate in three decades, and statewide offices are dominated by Republicans.

But O'Rourke has managed to close the polling gap with Cruz in recent months.

The Cook Political Report, an election handicapper rates the race as leaning Republican, meaning that Cruz has a slight advantage in an otherwise competitive race.

The PPP survey also showed that more Texas voters disapprove of the job Cruz has done in office than approve, at 48-43 percent.

At the same time, slightly more respondents reported having an unfavorable opinion of O'Rourke than a favorable one, at 40-39 percent. The survey found that 21 percent weren't sure about their opinion of O'Rourke, suggesting that he may not have the widespread name recognition in the state that Cruz, who is running for his second term.

The two Senate candidates are set to hold their first debate of the general election season on Friday.

The PPP poll was commissioned by Protect Our Care, a group opposing Republicans' health care agenda.

PPP surveyed 613 registered Texas voters from Sept. 19-20.