Richard Kovacs, the president of the American College of Cardiology, told NBC News that by releasing one simple indicator of his heart health, Sen. Bernie Sanders could address some lingering questions.

“That indicator, called the left ventricular ejection fraction, is provided to any patient after a heart attack… It’s a measure of how much blood volume the heart pushes out with an individual heartbeat and it correlates with the risk for future cardiac events and mortality rate.”

Said Kovacs: “Normally the heart will push out 60 percent. If you go down to 40 or 50 percent, we regard that as mild impairment of the left ventricle. Thirty to 40 percent would be moderate. If you get to 30 percent, that would be severe.”

“You can tell how good I feel by how nervous the establishment is getting. We’re their worst nightmare.”

— Sen. Bernie Sanders, quoted by the Associated Press.

“President Trump’s reelection campaign is beginning to aggressively attack a rising threat to his power: Bernie Sanders,” BuzzFeed News reports.

“The Trump campaign put out two statements centered on Sanders this week and the Vermont senator was at the top of the list of people the president attacked at his first rally of the year in Toledo, Ohio on Thursday night.”

“Sen. Bernie Sanders abruptly retracted his endorsement of controversial congressional candidate Cenk Uygur on Friday, making a rare concession to critics who were angered by Uygur’s explicit and demeaning comments about women and minorities in past years,” the Washington Post reports.

Ron Brownstein: “There are signs Hispanics may prove a kind of secret weapon for Sanders. In a recent Fox News poll of Nevada, Hispanics there preferred Sanders over Biden by 7 percentage points. Sanders also led Biden with them by 9 points in a recent Latino Decisions poll of California and doubled the former vice president’s vote among them in the University of Texas at Tyler poll. Sanders narrowly led Biden with Hispanics in a New York Times/Siena poll of Florida, and the two ran even in Arizona, according to the OH Predictive Insights survey.”

Ed Kilgore: “The evidence of Sanders’s strength among Latinos is everywhere, most recently in a University of California IGS survey of the Golden State, where Sanders led the field, in no small part because of his 32 percent showing (Biden is second at 19 percent) among Latinos.”

Asked if President Obama “would really lay himself on the line to prevent” Sen. Bernie Sanders from being nominated for president, an Obama adviser told Politico: “I can’t really confirm that… He hasn’t said that directly to me.”

He added: “The only reason I’m hesitating at all is because, yeah, if Bernie were running away with it, I think maybe we would all have to say something. But I don’t think that’s likely. It’s not happening.”

Rep. Ilhan Omar (D-MN) is throwing her support behind Sen. Bernie Sanders’s presidential campaign, joining fellow first-year Rep. Alexandria Ocasio-Cortez (D-NY) in endorsing the progressive senator, The Hill reports.

Omar added that Rep. Rashida Tlaib (D-MI) is also endorsing Sanders’s presidential bid.

Sen. Bernie Sanders “tamped down on speculation that he would slow his presidential campaign after he suffered a heart attack last week, saying he plans to compete as vigorously as ever for the 2020 Democratic nomination,” NBC News reports.

Said Sanders: “I misspoke the other day, I said a word I should not have said and media drives me a little bit nuts to make a big deal about it. We’re going to get back into the groove of a very vigorous campaign, I love doing rallies and I love doing town meetings.”

He added: “I want to start off slower and build up and build up and build up.”

Sen. Bernie Sanders, a week after suffering a heart attack, said that he planned to slow down his pace on the campaign trail and acknowledged that voters would likely consider his health when deciding whether to vote for him, the New York Times reports.

Said Sanders: “We were doing, you know, in some cases five or six meetings a day, three or four rallies and town meetings and meeting with groups of people. I don’t think I’m going to do that.”

He added: “I think we’re going to change the nature of the campaign a bit. Make sure that I have the strength to do what I have to do.”

“I must confess that I was dumb. I should have listened to those symptoms.”

— Sen. Bernie Sanders, quoted by CBS News, saying he ignored symptoms in recent weeks that suggested he had heart problems.

New York Times: “Mr. Sanders’s emergency — the sudden onset of chest pain known as angina — is one that thousands of other Americans experience each year. Mr. Sanders’s discomfort occurred at a campaign event on Tuesday night. Because it signaled acute heart trouble, the senator went to the hospital where doctors implanted two stents in one of the coronary arteries that nourish the heart.”

“Doctors often release patients who undergo such procedures in a day or two. Mr. Sanders remains in the hospital, and his campaign has closely guarded pertinent details about his heart condition and treatment, raising questions about the extent of his health issues.”

“Among other things, Mr. Sanders has not disclosed whether blood and electrocardiogram tests showed he had a heart attack. The senator and his campaign have not allowed reporters to interview his doctors.”

Slate: “Based on the information his campaign has released, this scenario seems to be what happened to Bernie Sanders on Tuesday evening. Without a close look at Sanders’ medical chart, it’s impossible to make a definitive diagnosis, and I have not reviewed the details of his case other than what has been reported to the media by his campaign. But even the scant information we have—that he had stents inserted overnight following an acute cardiac episode—is enough to be able to say: This was very likely a heart attack.”

“I asked the Sanders’ campaign directly if they could confirm that this was or was not a heart attack. They declined to comment on the record. On Wednesday evening, the Wall Street Journal ran a story that originally stated a spokesperson for Sanders said the senator ‘didn’t suffer a heart attack,’ but that story was later updated to remove that assertion.”

First Read: “As long as he’s a presidential candidate, at age 78, the campaign owes the public more answers about his health situation.”

Sen. Bernie Sanders “unveiled a proposal to create a new tax on the wealth of the richest Americans, including a steep tax on billionaires that could greatly diminish their fortunes,” the New York Times reports.

“With the proposal, Mr. Sanders is embracing an idea that has been a centerpiece of the campaign of his top progressive rival, Sen. Elizabeth Warren. But while Ms. Warren came first, Mr. Sanders is going bigger. His wealth tax would apply to a larger number of households, impose a higher top rate and raise more money.”

One million people have donated to Bernie Sanders’ presidential campaign, Politico reports.

He is the first candidate to announce reaching that milestone.