A tearful Nancy Pelosi said members of Congress may be prosecuted over the Capitol insurrection as she launched a major security review.
And Ms Pelosi also warned lawmakers that they could face criminal charges if they were found to have aided the pro-Trump mob.
Democratic lawmakers are investigating whether members of Congress gave rioters tours of the Capitol in the days before the violence unfolded.
“Last week, we suffered a devastating attack on the Capitol that threatened the lives of and traumatised members of Congress, staff and support workers,” said Ms Pelosi.
“To protect our Democracy, we must now subject the security of the US Capitol Complex to rigorous scrutiny.".
Ms Pelosi says he will conduct an immediate review of security, inter-agency interaction and Capitol “command and control.”.
"I have asked retired Lieutenant General Russel L Honoré to lead an immediate review of security infrastructure, inter-agency processes and command and control," Pelosi said Friday morning. »