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 CastroElection security to take back seat at Mueller hearing Immigrants on edge over prospect of ICE raids Here are the 95 Democrats who voted to support impeachment MORE (D) and his brother, former Secretary of Housing and Urban Development Julián Castro, will join Rep. Beto O'RourkeBeto O'RourkeO'Rourke calls Trump event 'almost an impromptu Nuremberg rally' after 'send her back' chants Biden's lead narrows in early voting states: poll New CBS poll shows Biden with 7-point lead in New Hampshire 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 CruzTed Cruz: 'Fox News went all in for Trump' 2 Republican senators introduce resolution to label antifa as domestic terrorists Ted Cruz: Trump's chances of winning reelection are '50-50' 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 Clinton5 things to know about Boris Johnson Trump says Omar will help him win Minnesota The Hill's Morning Report — Trump applauds two-year budget deal with 0 billion spending hike 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.