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Barely two weeks before the election, Republican Sen. Ted Cruz as the two candidates embark on their last full week of campaigning.

O'Rourke is currently a Democratic U.S. Representative from El Paso who is now challenging Republican U.S. Sen. O'Rourke managed to squeeze nearly as much support in the survey of 1,078 likely voters from Texas' black (86-12) and Latino populations (60-36) as well as Texas women (52-45).

Just 3 percent of likely voters contacted by the pollsters remain undecided, reflecting the deeply polarized nature of the electorate and the fact that Cruz is just as appealing to conservatives as O'Rourke is to progressives.

Rep. Beto O'Rourke (D-TX) has gained ground in the newest poll from Quinnipiac University. However, recent polls still show him trailing by single digits.

The same pollsters found a 9 percentage point lead for Cruz in a poll released October 11, and the same margin three weeks before that, despite the intervention of President Donald Trump, who headlined a rally of 16,000 in Houston for Cruz last Monday night.

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O'Rourke led 56 percent to 40 percent among independent voters and 96 percent to 2 percent among Democrats.

Cruz's comparative dominance among men is key, according to Brown.

"Senator Cruz is ahead due to his winning the 'gender gap, ' " Brown said. The margin of error is plus or minus 3.5 percentage points.

President Donald Trump and Vice President Mike Pence are among those who have traveled to Texas to campaign on Cruz's behalf.