Julián Castro responds to Trump attack: 'Joaquin and I will keep fighting'

Julián Castro responds to Trump attack: 'Joaquin and I will keep fighting'
© Greg Nash

Democratic presidential candidate Julián Castro responded to President TrumpDonald John TrumpFacebook releases audit on conservative bias claims Harry Reid: 'Decriminalizing border crossings is not something that should be at the top of the list' Recessions happen when presidents overlook key problems MORE's attack Wednesday by saying he and his brother, Rep. Joaquin CastroJoaquin CastroThe exhaustion of Democrats' anti-Trump delusions Juan Williams: Democrats finally hit Trump where it hurts Texas Democrats tap Joaquin Castro to deliver key address MORE (D-Texas), will keep fighting.

"Joaquin and I will keep fighting. The American people will fight every day for our nation, against your hate, your corruption, and your ego. And we’ll win. #AdiósTrump," Castro tweeted along with a video clip from the Democratic debate.

Trump lashed out at the Castros on Twitter on Wednesday night after the congressman tweeted names of prominent San Antonio-area Trump donors. 

Trump initially misspelled Joaquin Castro's name. The deleted tweet was replaced with another echoing the same message. 

"I don’t know who Joaquin Castro is other than the lesser brother of a failed presidential candidate (1%) who makes a fool of himself every time he opens his mouth. Joaquin is not the man that his brother is, but his brother, according to most, is not much. Keep fighting Joaquin!" Trump tweeted.

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Members of Trump's campaign had criticized Joaquin Castro for sharing the list of donors. 

Candidates are required to disclose names and employers of donors who give $200 or more in Federal Election Commission filings, which are publicly available online. 

Trump's tweet came as he was leaving El Paso, Texas, after visiting victims of Saturday's mass shooting that killed 22 people.