Three of President Donald Trump’s most controversial nominees will testify before the Senate on Thursday in what could be a make-or-break moment for the trio of administration picks.

Robert F. Kennedy Jr., tapped to be Trump’s health and human services secretary, will appear for his second day of testimony, while Tulsi Gabbard and Kash Patel, nominated for intelligence chief and FBI director, respectively, will face senators for the first time in a committee setting.