One hand may be washing the other as Secretary of the Department of Housing and Urban Development Julián Castro formally endorsed Hillary Clinton for the Democrat nomination for president today, and in turn she hinted that she’s taking a hard look at Castro for the number two spot on her ticket.

Castro endorsed Clinton on Thursday in San Antonio, becoming the second member of the Obama cabinet to endorse Clinton.

The move, reported Wednesday by HousingWire, came at the launch of “Latinos for Hillary” in San Antonio.

Castro is on the vice-presidential short lists for Clinton, and likely other Democrats vying for the nomination.

"I am really going to look hard at him for anything, because that is how good he is," Clinton said in Texas at a Hispanic Chamber of Commerce event, when asked if Castro was under consideration.

(Related: Presidential hopefuls and housing policy experts are set to tackle housing policy at a bipartisan housing summit on Friday.)

The Castro endorsement is will likely shore up Clinton’s faltering poll numbers, at least among Hispanic voters.

Castro formerly served as mayor of San Antonio, a largely ceremonial position in the strong-manager style city government. He has focused on affordable housing issues since taking the helm at HUD in July 2014.

Castro has been touted as the “Hispanic Obama” after he gave a well-received speech at the Democratic National Convention in 2012.