When will President Biden campaign for the Harris-Walz ticket?

President Joe Biden has endorsed Vice President Kamala Harris as his successor, allowing her to take the lead in the Democratic campaign. While Biden remains in the background, Harris has quickly gained momentum, energizing Democratic donors and volunteers. Despite not being a candidate, Biden will support Harris at public events, including the Democratic National Convention. His focus remains on his current presidential duties, but he is expected to be a significant influence on the campaign trail, helping to transition leadership to a younger generation.

What is the significance of Biden's statement about wanting to be a validator for Harris's vision?

In what ways does the White House indicate President Biden will support Harris's campaign?