Bernie Sanders told the chairwoman from the convention floor that Clinton should be selected.
"Only one person I believe is truly qualified to be president of the United States, and that is Hillary Clinton."
Chants of "Bernie" echoed through the arena, and boos could be heard at times when Clinton's name was raised.
Presidente de EU da su respaldo a la demócrata para ocupar la Casa Blanca
Sanders congratulated Clinton for securing enough delegates to win the Democratic nomination and vowed to do everything he could to help her defeat Republican candidate Donald Trump.
But he's far from endorsing her.
El senador no ha suspendido su campaña con el argumento de que quiere seguir hasta la celebración de la Convención Nacional Demócrata en Filadelfia, para hacer oír su programa político, no obstante, al parecer, reconoció indirectamente el triunfo de Hillary Clinton
The senator is yet to concede.
The two met for about 90 minutes Tuesday night at a Washington, D.C., hotel.
Clinton would be the first woman to become the presidential candidate of a major U.S. political party.