Tuhia he tohutoro mō tēnei wāhanga - I te tau 2008, ka noho a Díaz hei tumuaki o te U.S. Conference of Mayors. I a ia e noho takitahi ana, he kaitono Democrat kua rehitatia, i korero a Diaz i te 2008 Democratic National Convention me te tautoko i te tono perehitini a Obama
He aha? Whai muri i te pooti a Obama, i whakaarohia a Diaz mo te Hekeretari o te HHS; ka riro te tuunga ki a Kathleen Sebelius.