Senate Republicans’ first public hearing into former President Joe Biden’s health on Wednesday laid the groundwork for a broader investigation into whether the White House concealed his condition and unlawfully authorized executive actions in his name.

The Senate Judiciary Committee hearing, titled “Unfit to Serve: How the Biden Cover-Up Endangered America and Undermined the Constitution,” focused on the former president’s increasing reliance on a mechanical autopen and raised constitutional questions about his ability to carry out the duties of his office.