Impeachment is "an anagram for 'pinch me meat,' which is, interestingly, the sentence that got the Lucky Charms leprechaun #MeToo'd," John Oliver said on Sunday's Last Week Tonight. But impeaching President Trump is also a big topic among Democrats. House Speaker Nancy Pelosi (D-Calif.) is pumping the brakes.

Pelosi is actually right "that many people don't fully understand what impeachment involves," Oliver said, "so we thought that tonight might be a good time to discuss what it is, why it may be warranted, and what the risks might be in carrying it out." He ran thought the impeachment process and the grounds for impeachment laid out in the Constitution: treason, bribery, or "high crimes and misdemeanors." That last category, which Trump doesn't appear to understand, covers a wide range of serious misdeeds, and Trump has provided a lot of fodder. Oliver focused on one particular incident of likely obstruction of justice and why it's a "very, very big deal."

"It's impossible to say how a Trump impeachment would play out, although him leaving office is extremely unlikely," Oliver cautioned. "That would require 20 Republican senators to vote against him, and even if they did that, there is still to guarantee that Trump would actually leave — he basically told us as much out loud." But "not opening an inquiry comes with consequences, too," he said, "because it essentially sends the message that the president can act with impunity, which is a dangerous precedent to set — not just for future presidents but for the current one."

Oliver said that after vacillating for a while, he is on Team Impeach. "Every a--hole succeeds until finally they don't," he said, citing Richard Nixon. "I can't guarantee that impeachment will work out the way that you want it to, because it probably won't. But that doesn't mean that it's not worth doing. Because if nothing else, we'd be standing by the basic, fundamental principle that nobody is above the law." There is NSFW language throughout. Peter Weber

Sen. Elizabeth Warren (D-Mass.) just earned a free campaign advertisement.

As the candidate surges in the 2020 race on platform of big business breakups, some Wall Street Democrats have indicated they'd hold onto their usual donations or even send them to President Trump if she ends up the nominee, CNBC reports. But seeing as Warren has had no trouble condemning banks and the absurdly wealthy throughout her time in government, that's probably not going to influence her campaign.

Warren has spent her campaign calling for a wealth tax, higher big business taxes, and a massive breakup of conglomerates in the tech and finance industries. Unsurprisingly, some finance types are not big fans. One senior private equity executive told CNBC they felt "in a box" because, while they "want to help the party," Warren is "going to hurt me." "They will not support her. It would be like shutting down their industry," an executive at a top bank similarly said of his industry.

But as soon as the CNBC story went up, tweets that surmised Warren's reaction came pouring in. Some pundits guessed the article would end up in a Warren fundraising email. The Washington Free Beacon's David Rutz suggested Warren herself gave a quote in disguise. And The Washington Post's Dave Weigel jokingly asked if the Warren campaign paid for the article altogether.

A spokesperson for Warren declined to comment to CNBC, but her approval of an earlier CNBC clip reporting that Wall Street executives are afraid of a Warren presidency speaks for itself. Kathryn Krawczyk

New information about the whistleblower who filed a complaint alleging abuses of power by President Trump has been revealed by The New York Times.

The anonymous whistleblower whose complaint sparked an official impeachment probe in the House of Representatives is a C.I.A. officer who was once detailed to work at the White House, the Times reports.

The Times writes that while "little else" is known about the whistleblower, the complaint "suggested he was an analyst by training," and his "expertise will likely add to lawmakers' confidence about the merits of his complaint."

Released publicly Thursday, the declassified complaint alleges Trump pushed for Ukraine's president to interfere in the 2020 presidential election by investigating former Vice President Joe Biden and that the White House then moved to restrict access to the transcript of that call.

The whistleblower's lead counsel slammed the Times for reporting information that might help identify the whistleblower, calling it "deeply concerning and reckless." Dean Baquet, executive editor of the Times, defended the decision in the report, saying the whistleblower's "credibility and his place in the government" is "essential to understanding one of the most important issues facing the country." Read the full report at The New York Times. Brendan Morrow

President Trump reportedly stunned attendees of a private breakfast Thursday by railing against the U.S. officials who provided information to a whistleblower, suggesting they should be harshly punished for treason.

Trump, The New York Times and the Los Angeles Times report, spoke Thursday to staff of the United States Mission to the United Nations and ranted about the sources who spoke with the anonymous whistleblower, saying, "I want to know who's the person who gave the whistleblower the information because that's close to a spy."

Trump reportedly then said, "You know what we used to do in the old days when we were smart with spies and treason, right? We used to handle it a little differently than we do now."

The president's remarks, the Times reports, "stunned people in the audience." They came following the release of the declassified complaint alleging Trump abused his power by pushing for Ukraine's president to investigate former Vice President Joe Biden and that White House officials then moved to restrict access to the call's transcript. Although the whistleblower did not have firsthand knowledge, the complaint says it is based on the account of more than half a dozen U.S. officials.

At this same event, Trump reportedly referred to reporters as "animals" and "scum" while saying that although "I didn't do anything," "I don't know if I’m the most innocent person in the world."

During his testimony Thursday, Acting Director of National Intelligence Joseph Maguire defended the whistleblower, saying they "acted in good faith throughout" the process and "did the right thing." Brendan Morrow

Impeachment is seemingly growing on House Speaker Nancy Pelosi (D-Calif.).

On Thursday morning, the House Intelligence Committee released a whistleblower report alleging President Trump's call with Ukraine's President Volodymyr Zelensky put national security at risk. And as Acting Director of National Intelligence Joseph Maguire testified about the whistleblower report, Pelosi delivered a solid burn to explain why she thought it was exceptionally incriminating for Trump.

In the report, the whistleblower alleges White House officials not only went to extra length to conceal Trump's call, but that it was far from the only time this has happened. Yet Trump has claimed the report is "exculpatory," Pelosi said, and she's not sure why, unless "maybe he doesn't know that word."

Pelosi went on to condemn Maguire's initial refusal to hand the whistleblower report to Congress' intelligence committees. "I think what the DNI did was broke the law," she said, spelling out what she thought the correct process would've been. Kathryn Krawczyk

As he seeks help in the impeachment battle to come, President Trump might bring back Corey Lewandowski.

Lewandowski, CNN reports, has recently "had conversations" with the White House about assuming a position in the administration "to help the president confront a looming impeachment fight." He would reportedly have a "crisis management type role" and would "assemble a team that mirrors the one that existed in Bill Clinton's White House when he was facing his own impeachment." Another name being floated for the team is reportedly former deputy campaign manager David Bossie, who the administration distanced itself from after he allegedly scammed donors.

Lewandowski served as Trump's campaign manager until he was fired in June 2016; he was charged with misdemeanor battery for allegedly grabbing a reporter, then the charge was later dropped. Since leaving the campaign, Lewandowski has remained loyal to Trump, defending the president during recent congressional testimony while glowingly describing his "historic campaign" and nostalgically recalling his "ride down the golden escalator." During a conference Wednesday, Trump said of Lewandowski's testimony, "Corey Lewandowski was fantastic the other day."

This news comes as CNN also reports there's some debate among White House aides about whether a team dedicated to impeachment is needed, but some close to the president are reportedly concerned that Trump "is in denial about the gravity of his predicament." Brendan Morrow

It seems most prominent conservatives aren't letting a whistleblower change their minds.

After the Thursday release of an intelligence whistleblower complaint detailing a concerning phone call between President Trump and Ukrainian President Volodymyr Zelensky, Trump's usual allies jumped to his defense. A swath of GOP lawmakers said there's nothing of importance in the report, while Republican Party officials tried to brush off Democrats' attempts to investigate it further.

But Erick Erickson, a conservative blogger and radio host, tweeted and wrote a blog post outlining why the complaint is actually "really bad for the president." At the core of his argument is that the complaint reads as credible, and that opens up a lot of investigative opportunities for Democrats.

The View host Meghan McCain, a conservative who has criticized Trump many times in the past, meanwhile had a brief but brutal response to the whistleblower's allegation that Trump officials have a pattern of hiding "politically sensitive" calls: "God help our country if this is true." Kathryn Krawczyk