Julián and Joaquin Castro to campaign with O'Rourke in Texas

Julián and Joaquin Castro to campaign with O'Rourke in Texas
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Texas Rep. Joaquin CastroJoaquin Castro Dems brush off unemployment rate, say Hispanics will reject Trump in 2020 Lawmakers renew push to create American Latino Smithsonian museum Joaquin Castro won't run for Senate in Texas MORE (D) and his brother, former Secretary of Housing and Urban Development Julián Castro, will join Rep. Beto O'RourkeBeto O'RourkeOvernight Energy: Warren wants Dems to hold climate-focused debate | Klobuchar joins candidates rejecting fossil fuel money | 2020 contender Bennet offers climate plan O'Rourke says he would 'absolutely' do Fox News town hall CNN announces four more town halls featuring 2020 Dems MORE (D-Texas) at stops along the Texas border, O'Rourke's Senate campaign team announced Thursday.

The trip with the Castro brothers will come after O'Rourke's first debate with incumbent Sen. Ted CruzRafael (Ted) Edward CruzCruz slams Jim Carrey's 'vicious, angry' painting of Alabama governor after abortion ban Eye-popping number of Dems: I can beat Trump 'SleepyCreepy Joe' and 'Crazy Bernie': Trump seeks to define 2020 Dems with insults MORE (R), scheduled for Friday.

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Polls have shown Cruz and O'Rourke in a tight race in deep-red Texas, and the Hispanic vote could be key to November's results. 

Cruz is getting support from 45 percent of likely Hispanic voters, 9 percent shy of the 54 percent who support O'Rourke, according to a Quinnipiac University poll released this week. 

Julián Castro, a former mayor of San Antonio, sits on the board of directors for Voto Latino, a nonprofit that encourages more political activity among Hispanics. He was considered as a potential vice presidential running mate to Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonThe Memo: Trump faces steep climb to reelection What the Mueller report tells us about Putin, Russia and Trump's election Steve Bullock puts Citizens United decision at center of presidential push MORE in 2016 in part because of his appeal to Hispanic voters.

He has also said that he is considering running for president in 2020, telling CSPAN in May that he would make a decision on whether to seek the nomination after the midterms.

His brother, Joaquin, has served in the House since 2013 as a representative for Texas's 20th Congressional District, which includes part of San Antonio.