(CNN) If you've ever wondered what it would be like to see President Donald Trump do a dramatic reading of some of his angrier tweets about special counsel Robert Mueller's investigation and congressional Democrats, wonder no longer! Because Trump did exactly that in a hastily-arranged press conference in the Rose Garden on Wednesday afternoon.

Standing at a podium decorated with a variety of facts and figures on the Mueller probe -- and with the words "NO COLLUSION" and "NO OBSTRUCTION" featured prominently -- Trump went off on Democrats (and the media) for, among other things, their alleged inability to accept the fact that he had done nothing wrong in regard to Russia or Mueller's investigation into that country's attempted interference in the 2016 presidential election.

Here's the key bit:

"I came here to do a on infrastructure meeting with Democrats -- not really thinking that they wanted to do infrastructure or anything else other than investigate. And I just saw that Nancy Pelosi, just before our meeting, made a statement that we believe that 'the President of the United States is engaged in a cover-up.' It turns out I'm the most -- I think most of you would agree to this -- I'm the most transparent president probably in the history of this country."

Trump, according to CNN reporting, had marched into the planned meeting with Speaker Nancy Pelosi and Senate Minority Leader Chuck Schumer on a potential infrastructure deal and informed them he couldn't do any deals while Democrats were investigating him. End of meeting. The President had been set off by Pelosi saying Wednesday morning -- following a meeting of the entire House Democratic caucus -- that Trump had "engaged in a cover-up" as it related to Mueller's Russia probe.