Washington Senator Maria Cantwell will be staring down at Facebooks CEO tomorrow.
Washington Senator Maria Cantwell will be staring down at Facebook's apologetic CEO tomorrow in DC. Chip Somodevilla / Getty Images

Attention Washington State: One of your US Senators, Maria Cantwell, will be part of the team of lawmakers grilling Facebook CEO Mark Zuckerberg tomorrow about how his company has handled (and mishandled) your information. Zuckerberg's even gonna lose the t-shirt and wear a suit for the occasion!

According to Zuckerberg's prepared testimony, he'll apologize for not doing enough to protect user data that many assumed was private. He's also going to say Facebook hasn't done enough to combat fake news, foreign interference in elections, and hate speech. "We didn't take a broad enough view of our responsibility," Zuckerberg will say. "And that was a big mistake. It was my mistake, and I'm sorry. I started Facebook, I run it, and I'm responsible for what happens here."

Cantwell's office says she's busy working on what she may ask him—a privilege Cantwell gets because she's a member of the Senate Commerce Committee.

Help a Senator out? What answers do you want Cantwell to demand from Zuckerberg tomorrow?