After a televised press conference in which Special Counsel Robert Mueller simply reminded viewers what was contained in his 448-page report, a growing number of 2020 Democratic presidential candidates are calling for impeachment proceedings against President Donald Trump.

On Wednesday morning, with the weary look of a professor at the end of a particularly trying school year, the special counsel presented a SparkNotes version of his two-year investigation into Russian interference in the 2016 election and possible obstruction of justice by the president. Mueller said that if his office “had had confidence that the president clearly did not commit a crime, we would have said so.” (As the report shows, they did not say so. Mueller helpfully noted that “the introduction to volume two of our report explains that decision.”) He reiterated the key Justice Department policy when investigating the executive branch: “Charging the president with a crime was …  not an option we could consider.”

Even in redacted form, these conclusions were laid out clearly more than a month ago in a Times New Roman–esque font with two spaces after each sentence. Yet when read aloud by the man who led the historic probe, they evidently sounded much more alarming to lawmakers. Just minutes after Mueller concluded his remarks, a line of 2020 Democratic presidential candidates emerged as though from a clown car to call for Congress to weigh in on the topic of impeachment.

“Mueller made clear this morning that his investigation now lays at the feet of Congress. No one is above the law—Congress should begin an impeachment inquiry,” tweeted former San Antonio Mayor Julián Castro. Senator Cory Booker of New Jersey echoed in his own tweet that “Congress has a legal and moral obligation to begin impeachment proceedings immediately,” adding: “I’ve been asking for Mueller’s testimony—today he made his views clear.” Senator Kirsten Gillibrand of New York chimed in later in the afternoon: “It’s time for Congress to begin impeachment hearings and follow the facts,” she said in a statement. “Robert Mueller clearly expects Congress to exercise its constitutional authority and take steps that he could not.”

“Mueller did his job. Now it’s time to do ours,” tweeted Representative Seth Moulton of Massachusetts. “Impeachment hearings should begin tomorrow.” Senator Kamala Harris of California argued that what Mueller “basically did was return an impeachment referral. Now it is up to Congress to hold this president accountable. We need to start impeachment proceedings. It’s our constitutional obligation.” South Bend, Indiana, Mayor Pete Buttigieg called Mueller’s statement “as close to an impeachment referral as you could get.” Senator Bernie Sanders of Vermont, who had so far been hesitant to endorse impeachment proceedings, said in a statement that “if the House Judiciary Committee deems it necessary, I will support their decision to open an impeachment inquiry.”

Of course, Mueller’s “views” became available in a searchable PDF file on April 18, but for many Democratic presidential hopefuls, on Wednesday morning the idea of impeachment swiftly transformed from a political taboo into a constitutional necessity. Other than Senator Elizabeth Warren of Massachusetts—who called for the House to “initiate impeachment proceedings against the President of the United States” upon the release of the Mueller report—and former Representative Beto O’Rourke of Texas, who on May 6 said that the House of Representatives had enough evidence to “move forward with impeachment,” any candidate who supported impeachment before Mueller’s oral remarks had done so in tepid language. Immediately after the report was released in April, Castro, in a radio interview, said that the special counsel’s findings made it “perfectly reasonable” for Congress to move forward with impeachment, without formally calling for it. Harris said in a CNN town hall later that month that she believed Congress should “take the steps towards impeachment,” though she acknowledged that the Republican-controlled Senate was unlikely to vote to impeach. In an interview in mid-May with CNN, Harris also fell short of saying that the standoff between Congress and the Trump administration amounted to a definitive “constitutional crisis.”