WASHINGTON (AP) — As Joe Biden nears the announcement of his vice presidential choice, the top contenders and their advocates are making final appeals.

The campaign hasn't finalized a date for naming a running mate, but three people who spoke on condition of anonymity to discuss the plans said a public announcement likely wouldn't happen before the week of Aug. 10. That's one week before Democrats will hold their convention to officially nominate Biden as their presidential nominee.

Biden said in May that he hoped to name his pick around Aug. 1 and told reporters this week that he would "have...