Julián Castro Ends Presidential Bid

Julian Castro announced the end of his presidential campaign, citing low polling numbers and the upcoming Iowa caucuses. Despite his influence on key issues and meeting donation criteria, he was disqualified from debates. Castro, the only Latino candidate, served under Obama and may appeal to Latino voters as a vice presidential pick.

What unique position did Castro hold in the Democratic primary?

What potential role is suggested for Castro in relation to the Democratic nominee?