The group has been scripting and testing ads since last year. But what do they think is going to work against Trump when every Republican attack has failed?

“While we don’t forecast our strategy specifically,” says Priorities spokesman Justin Barasky, “it’s likely that we will explore Donald Trump’s temperament, character, and selfish legacy of enriching himself at the expense of others.”

The chief strategist at Priorities, Guy Cecil — who was the political director on Clinton’s 2008 campaign, then executive director of the Democratic Senatorial Campaign Committee — says the group will pose three central questions to voters.

First, “Is this the type of person that has the character and temperament to be president — someone who has made his way through the primary by belittling groups of Americans with sexist and homophobic remarks?”

Second, “Do we want a president who lifts the people up or tears them down?”

And finally, “Do we have the right person to provide steady, consistent, experienced leadership to keep the country safe? There is a strong contrast there that we can draw between Hillary Clinton and Donald Trump.”