But that's about to change in a big way.

Since Biden won't step forward to define himself… President Donald Trump's campaign is about to do it for him.

And it won't be a pleasant portrait.

On the flip side, Biden's team has limited his public appearances to carefully staged events with few opportunities for questions about his record, his past, and the ethically challenged situations involving his troubled son, Hunter Biden.

So the Trump campaign is raising those questions itself as part of a surge in online spending that could add up to more than $10 million.

And it launched smack in the middle of the DNC.

"The Trump campaign is trying to make sure that Mr. Trump's message will be almost impossible to miss even during the Democrats' biggest week," the New York Times reported.

The aggressive move includes 96 straight hours of YouTube advertising that ran during the DNC itself, The Hill notes. That's even more significant than it may appear given how many watched the DNC via the streaming service.

Before tuning in to see Democrats lauding the former vice president… they had to see Trump's message first.