WASHINGTON (AP) — Joe Biden says he's begun preparing for presidential debates that begin later this month by studying President Donald Trump's past comments.

"I haven't been doing mock debates very much but I've been just making sure that I understand all that he has said and hasn't said," the Democratic presidential candidate told reporters as he prepared to fly back to his home state of Delaware on Tuesday night, after an event marking the start of Hispanic Heritage Month in Orlando, Florida.

Biden said he didn't know who might play Trump when he does begin staging mock debates.

The former vice president said before his Florida visit that he wants to improve his standing with Hispanic voters ahead of November's election. But he said Tuesday night, "We're doing just fine."

"Here in Florida there's not a whole of Puerto Ricans that are going to vote for Donald Trump after what he's done for Puerto Rico," Biden said, referring to the slow federal response after Hurricane Maria's 2017 devastation of the island. "So they know him but they've got to know more about me."

He also said Hispanics in Florida and elsewhere wouldn't be deceived by Trump's attempts to portray him as soft on socialism and communism.