While former special counsel Robert Mueller was testifying Wednesday on Capitol Hill about his investigation into Donald Trump, Sen. Elizabeth Warren was hundreds of miles away. But, she also, in her own way was building a case for Trump’s impeachment.

Warren, one of the leading candidates for the Democratic presidential nomination, came out for impeachment shortly after the Justice Department released the redacted version of the Mueller Report detailing the two-year investigation.

While the number of rank-and-file Democrats endorsing impeachment has grown, House Speaker Nancy Pelosi and her leadership team have largely been circumspect on the question, most recently last week killing a move to launch impeachment.

One consideration voiced against impeachment has been political, in that the Republican Senate is certain to acquit Trump, leaving the impeached president in office.

However, Warren on Wednesday was at the annual NAACP meeting in Detroit, Mich., arguing that lawmakers had a higher duty than politics to consider.

“I understand there are people who for political reasons say this is not where we want to be, but in my view some things are above politics, and one of them is our constitutional responsibilities to do what is right, and the responsibility of the Congress of the United States of America, when a president breaks the law, is to bring impeachment charges against that president,” Warren said. “My view is, whether it would pass the Senate or not, this is a moment in history and every single person in Congress should be called on to vote and then to live with that vote for the rest of their lives.”