House Speaker Nancy Pelosi made the comment during a press conference.
Commenting on the riot at the Capitol building, she added: "We will be going forward to make sure this never happens again [...] we will investigate and evaluate what caused this both in terms of the security and the motivations, and recognize how inflaming some our elected officials can be."
The comment drew criticism on Twitter because some felt it showed support for the Republican party. However, it is common for politicians and speakers to call for a strong opposition, regardless of their political leanings.
On January 13, Trump was acquitted for his role in the Capitol riots, with a 57-43 vote in the Senate.