Facebook co-founder and CEO Mark Zuckerberg is set to testify before the Senate Judiciary Committee and the Committee on Commerce, Science and Transportation on Tuesday.

Facebook is facing scrutiny over allegations that research firm Cambridge Analytica had improperly gained access to private information of tens of millions of its users. The political consulting firm is funded in part by financier Robert Mercer and is linked to President Trump’s presidential campaign.

Zuckerberg is expected to testify before the US House of Representatives Committee on Energy and Commerce on Wednesday.

Guests:

Ashley Gold, technology reporter for Politico Pro who is at Zuckerberg hearing; she tweets @ashleyrgold

Elizabeth Dwoskin, Silicon Valley correspondent for the Washington Post who has reported on how Zuckerberg’s congressional testimony could affect his legacy and Silicon Valley; she tweets @lizzadwoskin

Emily Cadei, D.C. correspondent for the Sacramento Bee who is at the Zuckerberg hearing; she tweets @emilycadei