SAN ANTONIO -

San Antonio Mayor Julian Castro is now in the history books as the first Latino keynote speaker at the Democratic National Convention.  He spoke just before First Lady Michelle Obama.

On Wednesday morning, his speech made front page of the local newspaper and was a water cooler topic of the day for many. .

San Antonio resident Mario Obledo Jr. said, "I thought it was fantastic. I think the mayor showed a lot of conviction and passion and certainly put San Antonio on the map.

"I thought he was awesome," said Diedrie Brewton. "I thought he was awesome, did an outstanding job (and) represented San Antonio well."

During his speech, Castro talked about his upbringing on the city's West side, the need for educational opportunities, and gave thanks to his family for their support.

"He had a good mix of history along with what his ideas are for the future," said Fred Plank. "Having said that, I'm a registered Republican."

On the KSAT 12 Facebook page, there were more than 600  responses to the speech on Wednesday morning..

Most were positive, but not all.

Lisa Lopez wrote: "Not happy that he represented my hometown of San Antonio since forever. SMH. Change is in the air. Romney & Ryan all the way."

Tyler Coleman wrote: "Blah, blah, blah. For a party who wants everyone to be seen as equals, race sure was mentioned one too many times!"

Although reactions are mixed, some people speculate Castro's speech could one day lead to a higher office. 

"I could see him being part of the Obama Cabinet (or) Senate," said Hubert Watson.

"Hopefully, one of these days he'll be the President," said Daniel Gallardo.