Tonight, you’re going to hear from a 41-year-old man who has remained largely unnoticed even though he was one of the top decision-makers of the Trump campaign.

His name is Brad Parscale. While Steve Bannon, Paul Manafort, and Kellyanne Conway are marquee names you’re familiar with, Parscale was in the back room — operating as the campaign’s secret weapon.

He was hired to run the digital team, but over time came to oversee advertising, data collection and much of the fund-raising. As digital director, he’s being drawn into the investigation of whether the campaign colluded with the Russians in the election. It’s a charge he denies. He says he was focused on competing with the Clinton campaign’s huge advantage in money and TV ads. What he decided to do was turn to social media, most importantly to Facebook.

“I understood early that Facebook was how Donald Trump was going to win. Twitter is how he talked to the people. Facebook was going to be how he won.” (Read more.)