Texas Rep. Joaquin Castro, the brother of 2020 presidential candidate Julián Castro, defended his decision to post the names of San Antonio residents who donated the maximum amount allowed to President Trump on his campaign's Twitter account.

The maximum donation is $2,800 each for federal primary and general election campaigns. Election law states individuals who donate over $200 to these campaigns report to the Federal Election Commission.

Castro told MSNBC it is not his intention for the Trump supporters to be harassed or their businesses be boycotted.

"Like I said, my post was actually as a San Antonian, my family has been here since 1922. It was a lament," Castro said. "It wasn’t meant as a boycott. It wasn’t meant to target these people. It was meant to draw attention to the fact we’ve got a lot of people in our community who are respected by San Antonio, who are contributing to this guy that’s using their money to fuel hate."

Morning Joe host Willie Giest pressed Castro, saying that despite the information be available to the public, putting their names on social media increases the risk of harassment.

"Look that ... that was not my intention," Castro replied. "These things are public. What I would like for them to do is think twice about supporting a guy who is fueling hate in this country."

[Also read: Top Democrat slammed for publishing Trump donor names]

Castro had defended the post on his personal Twitter account on Tuesday in response to Minority Leader Kevin McCarthy's criticisms.