But like any good negotiator, the daddy-to-be maintains the name must have his final seal of approval. 

“I think I just have veto power, I don’t think I really have beyond that,” chuckles Castro.

The couple agreed that they’d like to have Baby Castro’s name chosen by the end of next month.

The freshman congressman admits he’s nervous but excited about becoming a first-time dad, and has been getting some words of wisdom from his twin brother, San Antonio Mayor Julián Castro (D): “I’ve been asking my brother for advice, since he has a four-year-old daughter.”

Castro and Flores are also moving full steam ahead with their plans for a wedding next June, but are “trying to get as much done before December as possible” because they expect “after December time will be a little tougher to come by.”

The soon-to-be parents are also dealing with a little bit of a housing conundrum. Castro says his fiancé, who works at a tech firm in his home state, will likely head to the nation’s capital and stay with him starting in January. But he warned her, “Come stay with me as long as you can stand it here in Washington because my condo’s about 520 square feet and we’re going to have a 1-month-old baby.”

So how about upgrading his pad? 

“Yeah, I wish!” he exclaims. “But no, I’m looking forward to it.”