Beto O'Rourke is a former Texas congressman.
He's running for President.
Julian Castro is the former mayor of San Antonio.
He's also running for President.
O'Rourke and Castro will appear in the Democratic Debates in Texas on Thursday.
However, the two have low poll and financing numbers.
Politico reports they barely qualified for the debates.
Some political pundits wonder if Castro and O'Rourke will attack each other during the debates or go after a top tier candidate.